11/19/2022 0 Comments Printable 3d color sudoku![]() Users can program objects to change color. “We were surprised that we were able to develop our own custom ink that was able to perform as well as it did at recoloring,” Mueller says. The photochromic dyes activate the colors in the base dye, which is then hardened by the photo-initiator. The ink has three parts: a base dye, a photo-initiator, and light-adaptable or “photochromic” dyes. Since there weren’t any 3D printable photochromic inks in existence, CSAIL had to create its own. “We use a UV light to change the pixels on an object from transparent to colored, and then a regular office projector to turn them from colored to transparent,” explains Stefanie Mueller, senior author and professor at CSAIL. The process, which the team calls “ColorFab,” was described in a recent paper, to be presented at the ACM CHI Conference on Human Factors in Computing Systems in Montreal this April. The color changing takes about 23 minutes. Users control the process pixel by pixel through a digital interface. UV light activates the colors you want, while visible light deactivates the ones you don’t. The plastic objects are printed using a special ink that changes color in response to light. Researchers at the lab have developed a method of changing the color of a 3D-printed object- after the object’s been printed. This sci-fi scenario is several steps closer to reality now, thanks to new research from MIT’s Computer Science and Artificial Intelligence Laboratory (CSAIL). You tell a salesperson, who pushes a button and-bingo!-the chair changes color to the exact lavender of your KitchenAid mixer. You find one, but-darn-it’s turquoise, which just doesn’t match your home color scheme. Imagine you’re in IKEA, looking for a plastic kitchen stool. ![]()
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