Expanded color space architectural paint and stain tinting system
View Patent ↗White-pigmented and unpigmented base paints and stains are custom-tinted using an automated colorant dispenser having a minimum fluid dispensing quantity less than 0.01 fluid ounce (<0.3 cm 3 ) and an array of colorants including a green-hued colorant having a color strength greater than that of a comparison colorant containing 12 wt. % PG7 pigment, a blue-hued colorant having a color strength greater than that of a comparison colorant containing 7 wt. % PB15:2 pigment, and a red-hued colorant having a color strength greater than that of a comparison colorant containing 17 wt. % PR209 pigment. The green-hued or blue-hued colorants are dispensed into the base paint or stain whenever a green-hued or blue-hued tint is required. Light pastel tints in small containers and strong colors in large containers may be prepared without requiring the use of additional colorants having the same general hue and lower color strength.
1. A method for point-of-sale custom paint or stain tinting, by dispensing colorant into white-pigmented or unpigmented base paint or stain using an automated colorant dispenser having a minimum fluid dispensing quantity less than 0.01 fluid ounce (<0.3 cm 3 ) and an array of colorants including white colorant, black colorant, yellow-hued colorant, green-hued colorant having a color strength greater than that of a comparison colorant containing 12 wt. % PG7 pigment, blue-hued colorant having a color strength greater than that of a comparison colorant containing 7 wt. % PB15:2 pigment, and red-hued colorant having a color strength greater than that of a comparison colorant containing 17 wt. % PR209 pigment, wherein said blue-hued colorant is dispensed into the base paint or stain whenever a blue-hued tint is required.
2. A method according to claim 1 wherein the dispenser has a minimum fluid dispensing quantity less than 0.007 fluid ounce (<0.2 cm 3 ).
3. A method according to claim 1 wherein the dispenser has a minimum fluid dispensing quantity less than 0.005 fluid ounce (<0.15 cm 3 ).
4. A method according to claim 1 wherein the green-hued colorant has a color strength comparable to that of a comparison colorant containing about 20 to about 48 wt. % PG7 pigment.
5. A method according to claim 1 wherein green-hued colorant has a color strength comparable to that of a comparison colorant containing about 22 to about 42 wt. % PG7 pigment.
6. A method according to claim 1 wherein the blue-hued colorant has a color strength comparable to that of a comparison colorant containing about 12 to about 28 wt. % PB15:2 pigment.
7. A method according to claim 1 wherein the blue-hued colorant has a color strength comparable to that of a comparison colorant containing about 13 to about 25 wt. % PB15:2 pigment.
8. A method according to claim 1 wherein the red-hued colorant has a color strength comparable to that of a comparison colorant containing about 29 to about 68 wt. % PR209 pigment.
9. A method according to claim 1 wherein the red-hued colorant has a color strength comparable to that of a comparison colorant containing about 31 to about 60 wt. % PR209 pigment.
10. A method according to claim 1 wherein the base paint or stain is in containers of about 0.9 to 20 L.
11. A method according to claim 1 wherein a mixture of the black colorant, a red oxide colorant and a yellow oxide colorant is dispensed into the base paint or stain whenever a brown oxide or raw umber tint is required.
12. A method according to claim 1 wherein the green-hued colorant is dispensed into the base paint or stain whenever a green-hued tint is required.
13. A method according to claim 1 wherein the red-hued colorant has a color strength greater than that of a comparison colorant containing 17 wt. % PR254 pigment.
14. A method according to claim 13 wherein the red-hued colorant has a color strength comparable to that of a comparison colorant containing about 29 to about 68 wt. % PR254 pigment.
15. A method according to claim 1 wherein the array of colorants includes yellow oxide colorant.
16. A method according to claim 1 wherein the array of colorants includes red oxide colorant.
17. A method according to claim 1 wherein the array of colorants includes transparent yellow oxide colorant or transparent red oxide colorant.
18. A method according to claim 1 wherein the array of colorants includes magenta-hued colorant having a color strength greater than that of a comparison colorant containing 7 wt. % PR122 pigment.