Drawing substrate
In a first aspect, the present disclosure relates to a drawing substrate, wherein the drawing substrate 100 comprises a first structure 120 attached to a second structure 110 , wherein the first structure 120 is hygromorphic.
1 . A drawing substrate, wherein the drawing substrate comprises a first structure attached to a second structure,
wherein the first structure is hygromorphic, and
wherein the first structure comprises a first section and a second section, the first section being attached to the second structure by an adhesive, and the second section comprising a free end,
wherein the first structure comprises a first layer and a second layer, wherein the first layer comprises a carrier material, and wherein the carrier material is at least one of porous or flexible.
2 . The drawing substrate according to claim 1 , wherein the carrier material comprises a first fabric comprising polymer fibers.
3 . The drawing substrate according to claim 2 , wherein the polymer fibers comprise polyamide, polyethylene terephthalate, polyester and/or polyethylene.
4 . The drawing substrate according to claim 1 , wherein the first layer comprises a solvatochromic colorant or a hydrochromic colorant.
5 . The drawing substrate according to claim 4 , wherein the solvatochromic colorant is configured to absorb less than about 80%/cm of light with a wavelength between about 380 nm to about 750 nm, when soluted.
6 . The drawing substrate according to claim 1 , wherein the second layer comprises a hygroexpansible material.
7 . The drawing substrate according to claim 1 , wherein the carrier material is hygroinert.
8 . The drawing substrate according to claim 1 , wherein the second layer comprises a hygromorphic material.
9 . The drawing substrate according to claim 8 , wherein the hygromorphic material comprises a hygroexpansible material and a hygroinert material, wherein the hygroexpansible material is configured to absorb more water compared to the hygroinert material.
10 . The drawing substrate according to claim 1 , wherein the second structure is non-hygromorphic.
11 . The drawing substrate according to claim 9 , wherein the hygromorphic material exhibits an increase of maximum bending curvature of between about 1.0 cm-1 to about 5.0 cm-1, when a water content within the hygroexpansible material is increased from about 20 wt.-% to about 100 wt.-%, relative to a maximum water absorption capacity of the hygroexpansible material.
12 . The drawing substrate according to claim 1 , wherein the adhesive is water-resistant, and wherein the second section does not include the adhesive.
13 . The drawing substrate according to claim 12 ,
wherein the first layer further includes a solvatochromic colorant or a hydrochromic colorant; and
wherein the second layer includes a hygroexpansible or hygromorphic material.
14 . The drawing substrate according to claim 13 , wherein the second structure is non-hygromorphic.
15 . The drawing substrate according to claim 14 , wherein the carrier material is hygroinert.
16 . The drawing substrate according to claim 15 , wherein the solvatochromic colorant is configured to absorb less than about 80%/cm of light with a wavelength between about 380 nm to about 750 nm, when soluted.
17 . A drawing substrate, wherein the drawing substrate comprises a first structure attached to a second structure,
wherein the first structure is hygromorphic, and
wherein the first structure comprises a first section including a mechanochromic material and a second section, the first section attached to the second structure by an adhesive, and the second section comprising a free end.
18 . The drawing substrate according to claim 17 , wherein the mechanochromic material is a mechanochromic layer.
19 . A system comprising:
a drawing substrate including a first structure attached to a second structure, wherein the first structure is hygromorphic, wherein the first structure comprises a first section and a second section, the first section attached to the second structure by an adhesive, and wherein the second structure includes a free end; and
a writing instrument, wherein the writing instrument is configured to dispense a liquid medium comprising water.
20 . The system of claim 19 , wherein the first section includes a solvatochromic colorant or a hydrochromic colorant.