laying around in the heat


Thermal Paper and Acetone Vapor

Acetone vapor, as an organic solvent, is able to darken the thermal ink in the receipt just like heat would do. In fact, a thermal printer doesn’t actually print anything on the paper, it just heats up the the substance on the paper in which it breaks down the organic solvent part that interacts with the ink and changes its color.

Four different types of imaging chemicals are used in thermally sensitive papers: leuco dyes, developers, sensitizers and stabilizers. And if you don’t have acetone laying around heating the underside of the thermal paper receipt also darkens the ink. So does rubbing it with a coin. The friction between the metal and the paper is enough to result in color change. 

Some thermal papers can contain BPA and BPS (Bisphenol A / S) which is a chemical considered to be an endocrine disruptor (messes with your hormones and shit) So this is an environmental and a health concern. So people who constantly handle thermal paper should be more careful. 

More science and gifs on my blog: rudescience
Gifs made from: This video
References: (x). 


Here is my beautiful baby, his name is Chet and apparently he likes to eat daisies
Also he likes to lay on heated blankets and he starts bouncing around at exactly 4:30 every day because he knows it’s time for him to eat
Chet loves you and he wants you to feel better!!