Tunable directional color transition compositions and methods of making and using the same
Color change compositions that transition from a first to second color state upon application of an applied stimulus are provided. Also provided are substrates having the compositions on a surface thereof, as well as methods of making and using the compositions.
1. A method of preparing a color change composition that transitions from a first color state to a second color state upon application of an applied stimulus, the method comprising contacting a color former with a color developer.
2. The method according to claim 1 , wherein the method further comprises contacting the color former and color developer with an emulsifier and a resin.
3. The method according to claim 1 , wherein the method comprises preparing an aqueous slurry.
4. The method according to claim 1 , further comprising comprises drying the color change composition.
5. The method according to claim 1 , further comprising preparing a powder form of the color change composition.
6. The method according to claim 1 , wherein the color former changes color in response to a phase transition of the color developer.
7. The method according to claim 1 , wherein the color developer comprises a glycerol monostearate derivative.
8. The method according to claim 1 , wherein the color developer comprises a polydiacetylene.
9. The method according to claim 1 , wherein the color former comprises a thermochromic dye.
10. The method according to claim 1 , wherein the color former comprises two or more distinct leuco dyes.
11. The method according to claim 10 , wherein the two or more distinct leuco dyes exhibit opposing color transition characteristics in response to the same applied stimulus.
12. The method according to claim 1 , further comprising microencapsulating the color change composition.
13. The method according to claim 1 , wherein the color change composition transitions from a colorless state to a colored state upon exposure to increasing temperature.
14. The method according to claim 1 , wherein the color change composition transitions from a colored state to a colorless state upon exposure to increasing temperature.
15. The method according to claim 1 , wherein the color change composition transitions from a colorless state to a colored state upon exposure to increasing solvation.
16. The method according to claim 1 , wherein the composition transitions from a colored state to a colorless state upon exposure to increasing solvation.
17. The method according to claim 1 , wherein the transition is reversible.
18. The method according to claim 1 , wherein the transition is irreversible.