I recently tried again to incorporate more Solar Color Dust colors into a shape memory polymer. I made four samples of the following ratios: 1.57 ml Epon 826/2.43 ml Jeffamine/3.12 ml NGDE. This ratio corresponds to a glass transition temperature of approximately 40 deg C. For these samples, the Solar Color Dust was mixed according to the instructions per the website (10 grams of dust to 1 pint of epoxy). Three of the samples contained just Solar Color Dust and epoxy, while the fourth contained Solar Color Dust, epoxy, and Castin Craft blue dye. Pictures of the samples are given below for heated and unheated specimens:
I took each of the samples and added some heat with my hand. The result is given below:
From this experimentation, Rubine Red seems to give the most significant color change out of all the powders an hand. Also, from the first picture, you can see that there is some clumping inside the epoxy. This clumping is due to the fact that the powder is not well dispersed within the epoxy. Therefore, may next time sonication might be used to disperse the particles. Since, I had some extra material left over, I mixed the Magenta, Sky Blue, and Green epoxy mixtures together and obtained the following result:
Note when all three of these colors are mixed together and not dispersed, the coloring is very beautiful and unique. However, due to lack of the dispersion, when heat is applied with the hand, not as visible of change is seen in the sample.