CAT Stickers are coated with a mixture of CAT dyes and Acrylic paint.
CAT Dyes are cold activated thermochromic dyes. Don’t panic, the terms are really not difficult if you take them in bite-size pieces.
1. Cold Activated— Cold refers to temperature. But cold is not a measurement. Instead it is a comparison between two temperatures. For all the Janice VanCleave color changing products, room temperature is the standard. This means that something would be cold if it is less than room temperature, which on the average is around 25 0 C (77 0F). Most of the JVC cold activated color changing products are activated around 15 0 C (59 0F), which can be achieved by cooling the CAT dyes with ice.
2. Thermochromic –Thermo refers to temperature and Chromic means a color change. Thus, thermochromic is a material that changes color in response to changes in temperature.
3. Dyes — A dye a colored substance that has an affinity to the materials that it is applied to. The dye is generally applied in an aqueous (water) solution. This means the dye is mixed with water.
Dyes usually require a mordant, which is a chemical that helps the dye to stick to surfaces. The Janice VanCleave Chromic dyes are ready to apply. The mordant or binder is already added.
Room temperature varies. Measure the room temperature using a thermometer.
If your investigation doesn’t need a precise room temperature measurements, the average
standard temperature used for room temperature is 25 °C ( 77 °F).
The Janice VanCleave CAT Stickers are not toxic.
But eating or licking CAT Stickers is not suggested.