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 color change composition comprising a color former and color developer that transitions from a first color state to a second color state upon application of an applied stimulus, wherein the color developer comprises a glycerol monostearate derivative.
2. The color change composition according to claim 1 , wherein the applied stimulus is a temperature stimulus.
3. The color change composition according to claim 1 , wherein the applied stimulus is solvation.
4. The color change composition according to claim 1 , wherein the applied stimulus is hydration.
5. The color-change composition according to claim 1 , wherein the applied stimulus is provided by an RFID device.
6. The color change composition according to claim 1 , wherein the transition is reversible.
7. The color change composition according to claim 1 , wherein the transition is irreversible.
8. The color change composition according to claim 1 , wherein the transition is uniform.
9. The color change composition according to claim 1 , wherein the transition exhibits hysteresis.
10. The color change composition according to claim 1 , wherein the color former is a thermochromic dye.
11. The color-change composition according to claim 1 , wherein the color-change composition comprises an adhesive.
12. The color change composition according to claim 1 , wherein the composition comprises two or more distinct leuco dyes.
13. The color change composition according to claim 12 , wherein the two or more distinct leuco dyes exhibit opposing color transition characteristics in response to the same applied stimulus.
14. The color change composition according to claim 1 , wherein the one or more of the components of the color change composition is micro-encapsulated.
15. The color change composition according to claim 1 , wherein the color change composition changes color in a time dependent manner.
16. The color change composition according to claim 1 , wherein the color change composition changes color in a time and temperature dependent manner.
17. A substrate comprising a color change composition according to claim 1 present on a least one surface thereof.
18. The substrate according to claim 17 , wherein the color change composition is present on the at least one surface in the form of a pre-determined pattern.
19. The substrate according to claim 18 , wherein the pre-determined pattern has a machine readable format.
20. A method comprising applying a quantity of a color change composition according to claim 1 to a surface of a substrate.
21. The color change composition according to claim 1 , wherein the color developer comprises a polydiacetylene.