Thermochromic Rubber Swatch

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I had some rubber casting supplies left over from a project last spring. What I wondered was if it would respond well to thermochromatic ink. And yes, I discovered, it works very well. The mix I used was about 1/2 tsp red, 1/4 tsp blue and an equal mix of part A and part B of the silicone rubber casting goo- about 4tbsp worth.

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Mix well. Use gloves and be in a well-ventilated area. I poured the mix into the lids of three small cups and laid the stainless steel thread into the goo.

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When cured (6hrs), the rubber was nicely reactive to temperature. However the thread I laid into the mix had become too resistive in the rubber and would not conduct enough to heat the matrix. To solve this, I sewed some stainless steel thread into the rubber. This solved the issue and worked quite well.

 

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