High softness, high durability bath tissues with temporary wet strength

1. A multi-ply bath tissue having no more than three plies and no fewer than two plies, the multi-ply bath tissue having a basis weight of from about 20 to about 35 lbs per 3000 sq foot ream, and comprising:

(A) from about 3% to about 50% cellulosic microfiber; and

(B) from about 50% to about 97% wood pulp fibers,

the multi-ply bath tissue having:

(a) sufficient temporary wet strength resin to provide an initial Finch Cup cross-machine direction (CD) wet tensile of from about 2.5 to about 20 g/3 in. per pound of basis weight, the initial Finch Cup CD wet tensile decaying to less than 65% of the initial value in less than 15 minutes after immersion in water; and

(b) a caliper of at least 5 mils per 8 sheets per pound of basis weight, wherein at least one of the plies comprises:

(i) a plurality of fiber-enriched hollow domed regions having a relatively high basis weight;

(ii) a plurality of connecting regions having a relatively lower basis weight forming a network interconnecting the fiber-enriched hollow domed regions of the sheet; and

(iii) a plurality of transition regions with upwardly and inwardly inflected consolidated fibrous regions transitioning from the connecting regions into the fiber-enriched hollow domed regions.

2. The multi-ply bath tissue of claim 1 , having an opacity of at least about 2.5 MacBeth Opacity Units per pound of basis weight.

3. The multi-ply bath tissue of claim 1 , comprising from about 5% to about 25% cellulosic microfiber and from about 75% to about 85% wood pulp fibers.

4. The multi-ply bath tissue of claim 1 , comprising two substantially unembossed plies and one embossed ply.

5. The multi-ply bath tissue of claim 1 , comprising one substantially unembossed ply and two embossed plies.

6. The multi-ply bath tissue of claim 1 , having a basis weight of from about 22 to about 32 lbs per 3000 sq foot ream.

7. The multi-ply bath tissue of claim 1 , comprising overall from at least about 5% up to about 50% of cellulosic microfiber (CMF) by weight and from about 50% to about 95% wood pulp fibers, the multi-ply bath tissue comprising three plies, at least one of the plies comprising at least one stratum comprising from about 15% to about 50% of cellulosic microfiber, the multi-ply bath tissue having an eight sheet caliper of at least about 5.25 mils per lb of basis weight for a 3000 sq foot ream, a breaking modulus of between 2.5 and 3.5 g/% stretch per pound of basis weight, a CD wet tensile of between 3.5 and 18 g/3 in. per pound of basis weight, and a geometric mean (GM) dry tensile (GMT) of between 30 and 60 g/3 in. per pound of basis weight.

8. The multi-ply bath tissue of claim 7 , wherein:

(i) the ply comprising the plurality of fiber-enriched hollow domed regions, the plurality of connecting regions, and the plurality of transition regions is a ply other than an interior ply, and

(ii) the at least one of the plies comprising the at least one stratum comprising from about 15% to about 50% cellulosic microfiber is disposed such that the stratum defines an exterior surface of the multi-ply bath tissue.

9. The multi-ply bath tissue of claim 7 , wherein at least two of the three plies comprise a plurality of fiber-enriched hollow domed regions having a relatively high basis weight, a plurality of connecting regions of a relatively lower basis weight forming a network interconnecting the fiber-enriched hollow domed regions of a sheet of the bath tissue, and a plurality of transition regions with upwardly and inwardly inflected consolidated fibrous regions transitioning from the connecting regions into the fiber-enriched hollow domed regions.

10. The multi-ply bath tissue of claim 7 , wherein each of the three plies comprises a plurality of fiber-enriched hollow domed regions having a relatively high basis weight, a plurality of connecting regions of a relatively lower basis weight forming a network interconnecting the fiber-enriched hollow domed regions of the sheet, and a plurality of transition regions with upwardly and inwardly inflected consolidated fibrous regions transitioning from the connecting regions into the fiber-enriched hollow domed regions.

11. The multi-ply bath tissue of claim 1 , wherein the fiber-enriched hollow domed regions in the plurality of fiber-enriched hollow domed regions are provided in an interpenetrating staggered array.

12. The multi-ply bath tissue of claim 1 , wherein, when tested according to the Wet Abrasion Lint Test, the Wet Abraded Lint Area is less than 35 mm 2 .

13. The multi-ply bath tissue of claim 1 , wherein, when tested according to the Wet Abrasion Lint Test, the Wet Abraded Lint Area is less than 30 mm 2 .

14. The multi-ply bath tissue of claim 1 , wherein, when tested according to the Wet Abrasion Lint Test, the Wet Abraded Lint Area is less than 25 mm 2 .

15. The multi-ply bath tissue of claim 1 , wherein, when tested according to the Wet Abrasion Lint Test, the Wet Abraded Lint Area is less than 20 mm 2 .

16. The multi-ply bath tissue of claim 1 , wherein, when tested according to the Dry Lint Test, the ΔL* value is less than 6.0.

17. The multi-ply bath tissue of claim 1 , wherein, when tested according to the Dry Lint Test, the ΔL* value is less than 5.0.

18. The multi-ply bath tissue of claim 1 , wherein, when tested according to the Dry Lint Test, the ΔL* value is less than 4.5.

19. The multi-ply bath tissue of claim 1 , wherein, when tested according to the Dry Lint Test, the ΔL* value is less than 4.25.

20. The multi-ply bath tissue of claim 1 , wherein the plies are joined to each other by knurling.

21. The multi-ply bath tissue of claim 1 , wherein the plies are embossed with a pattern having primarily points to the inside and are joined by glue-lamination.

22. The multi-ply bath tissue of claim 1 , comprising three plies of tissue, wherein two plies are embossed, one ply is unembossed, and the plies are joined by knurling, wherein knurled regions are arranged in a meandering path.

23. The multi-ply bath tissue of claim 1 , comprising three plies of tissue, wherein two plies are unembossed, one ply is embossed, and the plies are joined by knurling, wherein knurled regions are arranged in a meandering path.

24. The multi-ply bath tissue of claim 1 , comprising three plies of tissue, wherein two plies are embossed, one ply is unembossed, and the plies are joined by knurling, wherein knurled regions are arranged in a meandering path and an outermost stratum of a lower ply has substantially the same composition as that of an outermost stratum of an upper ply.

25. The multi-ply bath tissue of claim 1 , having a geometric mean (GM) dry tensile of from about 17 to about 80 g/3 in. per pound basis weight.

26. The multi-ply bath tissue of claim 1 , having a CD dry tensile of between about 30 to about 60 g/3 in. per pound of basis weight.

27. A three-ply bath tissue having a basis weight of from about 20 to about 35 lbs per 3000 sq foot ream, and comprising:

(A) from about 5% to about 25% cellulosic microfiber; and

(B) from about 75% to about 95% wood pulp fibers,

the three-ply bath tissue having:

sufficient temporary wet strength resin to provide an initial Finch Cup cross-machine (CD) wet tensile of from about 2.5 to about 20 g/3 in. per pound of basis weight, the initial Finch Cup CD wet tensile decaying to less than 75% of the initial value in less than 1 hour after immersion in water, wherein at least one of the plies, other than an interior ply, comprises:

(i) a plurality of fiber-enriched hollow domed regions having a relatively high basis weight;

(ii) a plurality of connecting regions having a relatively lower basis weight forming a network interconnecting the fiber-enriched hollow domed regions of the sheet; and

(iii) a plurality of transition regions with upwardly and inwardly inflected consolidated fibrous saddle shaped regions transitioning from the connecting regions into the fiber-enriched hollow domed regions.

28. The three-ply bath tissue of claim 27 , having a geometric mean (GM) dry tensile of from about 17 to 80 g/3 in. per pound of basis weight.

29. The three-ply bath tissue of claim 27 , having a geometric mean (GM) breaking modulus of between 1.5 to 6.5 g/% stretch per pound of basis weight.

30. The three-ply bath tissue of claim 27 , having a CD dry tensile of between about 2 to about 30 g/3 in. per pound of basis weight.

31. The three-ply bath tissue of claim 27 , having an opacity of at least about 2.0 MacBeth Opacity Units per pound of basis weight.

32. A multi-ply bath tissue having no more than three-plies and no fewer than two-plies, the multi-ply sheet having a basis weight of from about 20 to about 38 lbs per 3000 sq foot ream, and comprising:

(a) up to about 30% cellulosic microfiber;

(b) from about 70% to about 90% wood pulp fibers; and

(c) from about 5% to about 50% by weight of the tissue comprising eucalyptus fibers having a lignin content of at least about 20%,

the multi-ply bath tissue having:

(i) sufficient temporary wet strength resin to provide an initial Finch Cup cross-machine direction (CD) wet tensile of from about 2.5 to about 20 g/3 in. per pound of basis weight, the initial Finch Cup CD wet tensile decaying to less than 65% of the initial value in less than one half hour after immersion in water; and

(ii) a caliper of at least 4 mils per 8 sheets per pound of basis weight.

33. The multi-ply bath tissue of claim 32 , having a geometric mean (GM) dry tensile of from about 35 to 80 g/3 in. per pound of basis weight.

34. The multi-ply bath tissue of claim 32 , having a CD dry tensile of between about 2 to about 30 g/3 in. per pound of basis weight.

35. The multi-ply bath tissue of claim 32 , having a caliper of at least 4.5 mils per 8 sheets per pound of basis weight.

36. The multi-ply bath tissue of claim 32 , having a caliper of at least 5 mils per 8 sheets per pound of basis weight.

37. The multi-ply bath tissue of claim 32 , wherein, when tested according to the Wet Abrasion Lint Test, the Wet Abraded Lint Area is less than 35 mm 2 .

38. The multi-ply bath tissue of claim 32 , wherein, when tested according to the Wet Abrasion Lint Test, the Wet Abraded Lint Area is less than 30 mm 2 .

39. The multi-ply bath tissue of claim 32 , wherein, when tested according to the Wet Abrasion Lint Test, the Wet Abraded Lint Area is less than 25 mm 2 .

40. The multi-ply bath tissue of claim 32 , wherein, when tested according to the Wet Abrasion Lint Test, the Wet Abraded Lint Area is less than 20 mm 2 .

41. The multi-ply bath tissue of claim 32 , having an opacity of at least about 2.5 MacBeth Opacity Units per pound of basis weight.

42. The multi-ply bath tissue of claim 32 , comprising from about 3% to about 10% cellulosic microfiber and from about 75% to about 85% wood pulp fibers.

43. The multi-ply bath tissue of claim 32 , comprising two substantially unembossed plies and one embossed ply.

44. The multi-ply bath tissue of claim 32 , comprising one substantially unembossed ply and two embossed plies.

45. The multi-ply bath tissue of claim 32 , having a basis weight of from about 22 to about 32 lbs per 3000 sq foot ream.

46. The multi-ply bath tissue of claim 32 , comprising three plies, at least the first and second plies of which comprise from about 3% to about 25% cellulosic microfiber, up to about 50% alkaline peroxide mechanical pulp (APMP) eucalyptus and from about 75% to about 97% wood pulp fibers, the multi-ply bath tissue having:

(a) an overall basis weight of between 22 and 36 lbs per 3000 sq ft ream;

(b) an eight sheet caliper of at least about 5.25 mils per lb of basis weight for a 3000 sq foot ream;

(c) a breaking modulus of between 2.5 and 3.5 g/% stretch per pound of basis weight;

(d) a CD wet tensile of between 3 and 18 g/3 in. per pound of basis weight; and

(e) a geometric mean tensile (GMT) of between 40 and 70 g/3 in. per pound of basis weight, wherein the percentage of eucalyptus APMP in the third ply is:

(i) greater than at least about 20%;

(ii) greater than the percentage of eucalyptus APMP in the first ply; and

(iii) exceeds the percentage of eucalyptus APMP in the first ply by an amount that is at least 20% of the weight of eucalyptus APMP in the first ply, if any.

47. The multi-ply bath tissue of claim 46 , wherein at least one of the plies comprises a web having a plurality of fiber-enriched hollow domed regions having a relatively high basis weight, a plurality of connecting regions having a relatively lower basis weight forming a network interconnecting the fiber-enriched hollow domed regions of the sheet, and a plurality of transition regions with upwardly and inwardly inflected consolidated fibrous regions transitioning from the connecting regions into the fiber-enriched hollow domed regions.

48. The multi-ply bath tissue of claim 47 , wherein the ply comprising the plurality of fiber-enriched hollow domed regions, the plurality of connecting regions, and the plurality of transition regions is a ply other than an interior ply.

49. The multi-ply bath tissue of claim 47 , wherein the fiber-enriched hollow domed regions in the plurality of fiber-enriched hollow domed regions are provided in an interpenetrating staggered array.

50. The multi-ply bath tissue of claim 46 , wherein at least two of the three plies comprise a plurality of fiber-enriched hollow domed regions having a relatively high basis weight, a plurality of connecting regions having a relatively lower basis weight forming a network interconnecting the fiber-enriched hollow domed regions of the sheet, and a plurality of transition regions with upwardly and inwardly inflected consolidated fibrous regions transitioning from the connecting regions into the fiber-enriched hollow domed regions.

51. The multi-ply bath tissue of claim 46 , wherein each of the three plies comprises a plurality of fiber-enriched hollow domed regions having a relatively high basis weight, a plurality of connecting regions having a relatively lower basis weight forming a network interconnecting the fiber-enriched hollow domed regions of the sheet, and a plurality of transition regions with upwardly and inwardly inflected consolidated fibrous regions transitioning from the connecting regions into the fiber-enriched hollow domed regions.

52. The multi-ply bath tissue of claim 46 , wherein, when tested according to the Wet Abrasion Lint Test, the Wet Abraded Lint Area is less than 35 mm 2 .

53. The multi-ply bath tissue of claim 46 , wherein, when tested according to the Wet Abrasion Lint Test, the Wet Abraded Lint Area is less than 30 mm 2 .

54. The multi-ply bath tissue of claim 46 , wherein, when tested according to the Wet Abrasion Lint Test, the Wet Abraded Lint Area is less than 25 mm 2 .

55. The multi-ply bath tissue of claim 46 , wherein, when tested according to the Wet Abrasion Lint Test, the Wet Abraded Lint Area is less than 20 mm 2 .

56. The multi-ply bath tissue of claim 46 , wherein, when tested according to the Dry Lint Test, the ΔL* value is less than 6.0.

57. The multi-ply bath tissue of claim 46 , wherein, when tested according to the Dry Lint Test, the ΔL* value is less than 5.5.

58. The multi-ply bath tissue of claim 46 , wherein, when tested according to the Dry Lint Test, the ΔL* value is less than 5.0.

59. The multi-ply bath tissue of claim 46 , wherein the plies are joined to each other by knurling.

60. The multi-ply bath tissue of claim 46 , wherein the plies are embossed in a pattern having primarily points to the inside and are joined by glue-lamination.

61. The multi-ply bath tissue of claim 46 , comprising three plies of tissue, wherein two plies are embossed, one ply is unembossed, and the plies are joined by knurling, wherein knurled regions are arranged in a meandering path.

62. The multi-ply bath tissue of claim 46 , comprising three plies of tissue, wherein two plies are unembossed, one ply is embossed, and the plies are joined by knurling, wherein knurled regions are arranged in a meandering path.

63. The multi-ply bath tissue of claim 46 , comprising two plies of tissue, wherein one ply is embossed, one ply is unembossed, and the plies are joined by knurling, wherein knurled regions are arranged in a meandering path.

64. A three-ply bath tissue having a basis weight of from about 20 to 38 lbs per 3000 sq foot ream, and comprising:

(A) from about 15% to about 25% cellulosic microfiber;

(B) from about 78% to about 85% wood pulp fibers; and

(C) from about 10% to about 50% of the weight of the tissue comprising eucalyptus fibers having a lignin content of at least about 20%, an ISO brightness of at least about 84, a Canadian Standard Freeness (CSF) of at least about 400 ml, a bulk of between 2.2 and 4.2 cc/g, and a breaking length of between about 1.2 and 4.7 km,

the three-ply bath tissue having:

sufficient temporary wet strength resin to provide an initial Finch Cup cross-machine direction (CD) wet tensile of from about 2.5 g/3 in. to about 20 g/3 in. per pound of basis weight, the initial Finch Cup CD wet tensile decaying to less than 65% of the initial value in less than one hour after immersion in water, and

wherein at least one of the plies, other than an interior ply, comprises:

(i) a plurality of fiber-enriched hollow domed regions having a relatively high basis weight;

(ii) a plurality of connecting regions having a relatively lower basis weight forming a network interconnecting the fiber-enriched hollow domed regions of the sheet; and

(iii) a plurality of transition regions with upwardly and inwardly inflected consolidated fibrous saddle shaped regions transitioning from the connecting regions into the fiber-enriched hollow domed regions.

65. The three-ply bath tissue of claim 64 , wherein at least 50% of the eucalyptus fibers having a lignin content of at least about 20% are never dried fibers.

66. The three-ply bath tissue of claim 64 , having a geometric mean (GM) dry tensile of from about 25 to 80 g/3 in. per pound of basis weight.

67. The three-ply bath tissue of claim 64 , having a breaking modulus of between 2.5 and 3.5 g/% stretch per pound of basis weight.

68. The three-ply bath tissue of claim 64 , having a cross-machine direction (CD) dry tensile of between about 30 to about 60 g/3 in. per pound of basis weight.

69. The three-ply bath tissue of claim 64 , having an opacity of at least about 2.5 MacBeth Opacity Units per pound of basis weight.

70. A three-ply bath tissue product having:

(A) an upper stratified ply comprising two strata, an outer stratum and an inner stratum,

(a) the outer stratum comprising a blend of at least about 30% to about 70% kraft fiber and at least 30% to about 70% by weight of eucalyptus kraft and having a basis weight of at least about 5 to about 12 lbs per 3000 sq ft ream; and

(b) the inner stratum comprising at least about 50% fibers having a lignin content of at least about 20% by weight and a basis weight of at least about 2.0 lbs per 3000 sq ft ream;

(B) an interior ply having a basis weight of at least about 6 to about 15 lbs per 3000 sq ft ream, comprising:

(a) at least about 30% to about 70% fibers having a lignin content of at least about 20% by weight; and

(b) from at least about 30% to about 70% by weight of bleached softwood kraft fibers; and

(C) a lower stratified ply comprising two strata, a first stratum and a second stratum,

(a) the first stratum comprising from at least about 30% to about 70% kraft fiber and from about 30% to about 70% by weight of eucalyptus kraft and having a basis weight of about 5 to about 12 lbs per 3000 sq ft ream; and

(b) the second stratum comprising at least about 50% fibers having a lignin content of at least about 20% by weight and a basis weight of at least about 2.0 lbs per 3000 sq ft ream,

wherein at least one of the plies comprises:

(i) a plurality of fiber-enriched hollow domed regions having a relatively high basis weight;

(ii) a plurality of connecting regions having a relatively lower basis weight forming a network interconnecting the fiber-enriched hollow domed regions of the sheet; and

(iii) a plurality of transition regions with upwardly and inwardly inflected consolidated fibrous saddle shaped regions transitioning from the connecting regions into the fiber-enriched hollow domed regions.

71. The three-ply bath tissue product of claim 70 , wherein at least 50% of the fibers having a lignin content of at least about 20% are never dried fibers.

72. The three-ply bath tissue product of claim 71 , wherein the outer stratum of the upper ply comprises at least about 8% by weight of individualized regenerated cellulosic microfiber.

73. The three-ply bath tissue product of claim 71 , wherein the outer stratum of the upper ply comprises at least about 8% by weight of individualized regenerated cellulosic microfiber having a number average diameter of at most about 2 microns.

74. The three-ply bath tissue product of claim 70 , wherein the interior ply and the upper stratified ply have been joined by being embossed together.

75. The three-ply bath tissue product of claim 74 , wherein the fibrous composition of the upper stratified ply is substantially the same as the fibrous composition of the lower stratified ply.

76. The three-ply bath tissue product of claim 74 , wherein the depth of emboss of the lower stratified ply is less than 50% of the depth of emboss of the upper stratified ply.

77. The three-ply bath tissue product of claim 74 , wherein the depth of emboss of the lower stratified ply is less than 80% of the depth of emboss of the upper stratified ply.

78. The three-ply bath tissue product of claim 76 , wherein the outer stratum of the upper stratified ply comprises at least about 8% by weight of individualized regenerated cellulosic microfiber having a number average diameter of at most about 2 microns.

79. The three-ply bath tissue product of claim 74 , wherein the lower stratified ply is generally unembossed.

80. The three-ply bath tissue product of claim 79 , wherein the outer stratum of the upper stratified ply comprises at least about 5% by weight of individualized regenerated cellulosic microfiber having a number average diameter of at most about 1 micron.

81. The three-ply bath tissue product of claim 70 , wherein the fibrous composition of the upper stratified ply is substantially the same as the fibrous composition of the lower stratified ply.

82. The three-ply bath tissue product of claim 70 , wherein the outer stratum of the upper stratified ply further comprises at least about 5% by weight of individualized regenerated cellulosic microfiber having a diameter of no more than about 5 microns and passing a screen of about 14 mesh.

83. The three-ply bath tissue product of claim 70 , wherein the outer stratum of the upper stratified ply further comprises at least about 5% by weight of individualized regenerated cellulosic microfiber having a number average diameter of no more than about 4 microns and a number average length of between about 50 microns and 2000 microns.

84. The three-ply bath tissue product of claim 70 , wherein the outer stratum of the upper stratified ply further comprises at least about 10% by weight of individualized regenerated cellulosic microfiber having a number average diameter of at most about 4 microns and a number average length of between about 50 microns and 2000 microns.

85. The three-ply bath tissue product of claim 70 , wherein the outer stratum of the upper stratified ply further comprises at least about 10% by weight of individualized regenerated cellulosic microfiber having a number average diameter of at most about 2 microns and a number average length of between about 50 microns and 2000 microns.

86. The three-ply bath tissue product of claim 70 , wherein the outer stratum of each of the upper stratifed ply and the lower stratified ply further comprises at least about 5% by weight of individualized regenerated cellulosic microfiber having a number average diameter of at most about 4 microns and a number average length of between about 50 microns and 2000 microns.

87. The three-ply bath tissue product of claim 70 , wherein each of the inner stratum of the upper stratified ply and the second stratum of the lower stratified ply comprises at least about 70% eucalyptus fibers having a lignin content of at least about 20% by weight.

88. The three-ply bath tissue product of claim 70 , wherein each of the inner stratum of the upper stratified ply and the second stratum of the lower stratified ply comprises debonder.

89. The three-ply bath tissue product of claim 70 , wherein the interior ply is creped, exhibiting a percent crepe at least 3% greater than that of the upper stratified and lower stratified plies.

90. A three-ply bath tissue product comprising:

(A) an upper stratified ply comprising two strata, an outer stratum and an inner stratum,

(a) the outer stratum comprising a blend of at least about 30% to about 70% kraft fiber and at least 30% to about 70% by weight of eucalyptus kraft and at least about 5% by weight of individualized regenerated cellulosic microfiber having a number average diameter of at most about 4 microns and a number average length of between about 50 microns and 2000 microns, the outer stratum having a basis weight of at least about 5 to about 12 lbs per 3000 sq ft ream; and

(b) the inner stratum comprising at least about 70% fibers having a lignin content of at least about 20% by weight, and a basis weight of at least about 2.0 lbs per 3000 sq ft ream;

(B) an interior ply having a basis weight of at least about 6 to about 15 lbs per 3000 sq ft ream, and comprising:

(a) at least about 40% to about 90% fibers having a lignin content of at least about 20% by weight; and

(b) from at least about 10% to about 60% by weight of bleached kraft fiber; and

(C) a lower stratified ply comprising at least two strata, including a first stratum and a second stratum,

(a) the first stratum comprising from at least about 30% to about 70% kraft fiber and from about 30% to about 70% by weight of eucalyptus kraft and having a basis weight of about 5 to about 12 lbs per 3000 sq ft ream; and

(b) the second stratum comprising at least about 70% fibers having a lignin content of at least about 20% by weight and a basis weight of at least about 2.0 lbs per 3000 sq ft ream,

wherein at least one of the plies, other than the interior ply, comprises:

(i) a plurality of fiber-enriched hollow domed regions having a relatively high basis weight;

(ii) a plurality of connecting regions having a relatively lower basis weight forming a network interconnecting the fiber-enriched hollow domed regions of the sheet; and

(iii) a plurality of transition regions with upwardly and inwardly inflected consolidated fibrous saddle shaped regions transitioning from the connecting regions into the fiber-enriched hollow domed regions.

91. The three-ply bath tissue product of claim 90 , wherein the upper stratified ply and the lower stratified ply have substantially identical fibrous compositions.

92. The three-ply bath tissue product of claim 90 , exhibiting an ISO brightness of at least:

0.82×(% VCP)+0.795×(% RF) 98 +0.84×(% APMP+CFM),

where % VCP is the percentage of virgin chemical pulp in a sheet in an outer ply, % RF, the percentage of recycle fiber in the outer ply, and % APMP+CMF is the percentage of alkaline peroxide mechanical pulp (APMP) eucalyptus and regenerated cellulosic microfiber in the outer ply.

93. The three-ply bath tissue product of claim 90 , wherein a major portion of the fibers in the interior ply is never dried fibers having a lignin content of at least about 23%, and exhibits an ISO brightness of at least about 82.

94. The three-ply bath tissue product of claim 90 , wherein the weight percentage of chemically pulped softwood fiber in the three-ply bath tissue product is limited to at most 30% of the weight of the three-ply bath tissue product.

95. The three-ply bath tissue product of claim 90 , wherein a major portion of the fibers in the interior ply has a lignin content of at least about 23%, and exhibits an ISO brightness of at least about 82.

96. A multi-ply bath tissue having a basis weight of from about 20 to about 40 lbs per 3000 sq foot ream, and comprising:

(A) from about 3% to about 50% cellulosic microfiber; and

(B) from about 50% to about 97% wood pulp fibers,

the multi-ply bath tissue having:

(a) sufficient temporary wet strength resin to provide an initial Finch Cup cross-machine direction (CD) wet tensile of from about 2.5 to about 20 g/3 in. per pound of basis weight, the initial Finch Cup CD wet tensile decaying to less than 65% of the initial value in less than 15 minutes after immersion in water; and

(b) a caliper of at least 5 mils per 8 sheets per pound of basis weight,

wherein at least one of the plies comprises:

(i) a plurality of fiber-enriched hollow domed regions having a relatively high basis weight;

(ii) a plurality of connecting regions having a relatively lower basis weight forming a network interconnecting the fiber-enriched hollow domed regions of the sheet; and

(iii) a plurality of transition regions with upwardly and inwardly inflected consolidated fibrous regions transitioning from the connecting regions into the fiber-enriched hollow domed regions.

97. The multi-ply bath tissue of claim 96 , having an opacity of at least about 2.5 MacBeth Opacity Units per pound of basis weight.

98. The multi-ply bath tissue of claim 96 , comprising from about 5% to about 25% cellulosic microfiber and from about 75% to about 85% wood pulp fibers.

99. The multi-ply bath tissue of claim 96 , having a basis weight of from about 22 to about 32 lbs per 3000 sq foot ream.

100. The multi-ply bath tissue of claim 96 , wherein, when tested according to the Wet Abrasion Lint Test, the Wet Abraded Lint Area is less than 35 mm 2 .

101. The multi-ply bath tissue of claim 96 , wherein, when tested according to the Wet Abrasion Lint Test, the Wet Abraded Lint Area is less than 30 mm 2 .

102. The multi-ply bath tissue of claim 96 , wherein, when tested according to the Wet Abrasion Lint Test, the Wet Abraded Lint Area is less than 25 mm 2 .

103. The multi-ply bath tissue of claim 96 , wherein, when tested according to the Wet Abrasion Lint Test, the Wet Abraded Lint Area is less than 20 mm 2 .

104. The multi-ply bath tissue of claim 96 , wherein, when tested according to the Dry Lint Test, the ΔL* value is less than 6.0.

105. The multi-ply bath tissue of claim 96 , wherein, when tested according to the Dry Lint Test, the ΔL* value is less than 5.0.

106. The multi-ply bath tissue of claim 96 , wherein, when tested according to the Dry Lint Test, the ΔL* value is less than 4.5.

107. The multi-ply bath tissue of claim 96 , wherein, when tested according to the Dry Lint Test, the ΔL* value is less than 4.25.

108. The multi-ply bath tissue of claim 96 , wherein the plies are joined to each other by knurling.

109. The multi-ply bath tissue of claim 96 , wherein the plies are embossed with a pattern having primarily points to the inside and are joined by glue-lamination.

110. The multi-ply bath tissue of claim 96 , having a geometric mean (GM) dry tensile of from about 17 to 80 g/3 in. per pound of basis weight.

111. The multi-ply bath tissue of claim 96 , having a CD dry tensile of between about 30 to about 60 g/3 in. per pound of basis weight.

112. A bath tissue having a basis weight of from about 20 to about 40 lbs per 3000 sq foot ream, and comprising:

(A) from about 3% to about 50% cellulosic microfiber; and

(B) from about 50% to about 97% wood pulp fibers,

the bath tissue having:

sufficient temporary wet strength resin to provide an initial Finch Cup cross-machine direction (CD) wet tensile of from about 2.5 to about 20 g/3 in. per pound of basis weight, the initial Finch Cup CD wet tensile decaying to less than 65% of the initial value in less than 15 minutes after immersion in water, wherein the bath tissue includes at least one ply comprising:

(i) a plurality of fiber-enriched hollow domed regions having a relatively high basis weight;

(ii) a plurality of connecting regions having a relatively lower basis weight forming a network interconnecting the fiber-enriched hollow domed regions of the sheet; and

(iii) a plurality of transition regions with upwardly and inwardly inflected consolidated fibrous regions transitioning from the connecting regions into the fiber-enriched hollow domed regions.

113. The bath tissue of claim 112 , having an opacity of at least about 2.5 MacBeth Opacity Units per pound of basis weight.

114. The bath tissue of claim 112 , comprising from about 5% to about 25% cellulosic microfiber and from about 75% to about 85% wood pulp fibers.

115. The bath tissue of claim 112 , having a basis weight of from about 22 to about 32 lbs per 3000 sq foot ream.

116. The bath tissue of claim 112 , wherein, when tested according to the Wet Abrasion Lint Test, the Wet Abraded Lint Area is less than 35 mm 2 .

117. The bath tissue of claim 112 , wherein, when tested according to the Wet Abrasion Lint Test, the Wet Abraded Lint Area is less than 30 mm 2 .

118. The bath tissue of claim 112 , wherein, when tested according to the Wet Abrasion Lint Test, the Wet Abraded Lint Area is less than 25 mm 2 .

119. The bath tissue of claim 112 , wherein, when tested according to the Wet Abrasion Lint Test, the Wet Abraded Lint Area is less than 20 mm 2 .

120. The bath tissue of claim 112 , wherein, when tested according to the Dry Lint Test, the ΔL* value is less than 6.0.

121. The bath tissue of claim 112 , wherein, when tested according to the Dry Lint Test, the ΔL* value is less than 5.0.

122. The bath tissue of claim 112 , wherein, when tested according to the Dry Lint Test, the ΔL* value is less than 4.5.

123. The bath tissue of claim 112 , wherein, when tested according to the Dry Lint Test, the ΔL* value is less than 4.25.

124. The bath tissue of claim 112 , having a geometric mean (GM) dry tensile of from about 17 to 80 g/3 in. per pound of basis weight.

125. The bath tissue of claim 112 , having a CD dry tensile of between about 30 to about 60 g/3 in. per pound of basis weight.

126. The bath tissue of claim 112 , having a caliper of at least 5 mils per 8 sheets per pound of basis weight.