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Does anyone know what solvent they were using? At one point, probably in early 1976, I took a sample of Liquid Paper thinner to my high school chemistry teache
by ScottBurson 8y ago
Does anyone know what solvent they were using? At one point, probably in early 1976, I took a sample of Liquid Paper thinner to my high school chemistry teacher, just out of curiosity, to see if he could figure out what it was. He revealed to me his pride and joy, an infrared spectrophotometer he kept in a room behind the lab. We ran a sample, but the resulting absorption curve wasn't anything he recognized, and we didn't pursue it any further. I'm sure it wasn't water, and I think he would have recognized carbon tetrachloride or something obvious like that, but that's about all the clues I have.
I never knew the story behind Liquid Paper, though, until now.
- rgbrenner 8y agothe original was just water based tempera paint. I'm not sure when, but definitely by the 70s, they reformulated it with trichloroethane as the solvent. In the 80s, that was replaced with naphtha.
- ScottBurson 8y agoAh, thanks. Yes, trichloroethane makes sense.
- pbhjpbhj 8y agoYes, probably one of the first intoxicants of some schoolkids - you'd get your face down low to concentrate and see where you were applying the stuff (Tippex in the UK, 1980s) and get a good nose-full. That ranks along with "banda" toner from fresh duplicates. (https://en.m.wikipedia.org/wiki/Spirit_duplicator https://en.m.wikipedia.org/wiki/Spirit_duplicator).