What is Mr. Color Thinner?

For as long as I’ve used Mr. Color, I always wonder what the composition of its thinner is. After all, they are so dang pricey, and we all know paint manufacturers just love to repackage common chemicals and resell them for ridiculous prices (e.g. enamel thinner = mineral spirits, Tamiya X-20A = alcohol). But Mr. Color is different. True you can thin it with hardware store lacquer thinners, but it is actually hotter than Mr. Color’s, because the latter doesn’t melt styrene plastic that all model uses.  Also it dries wayyyyy to fast and crazed my kits.

After a bit of browsing today, I found the  chemical composition of Mr. Color sheet.  To read off the pdf, it says 2-Pentanone, 4-hydroxy-4-methyl- + 2-Propanol + isobutyl alcohol + 2-Pentanone, 4-methyl + Ethanol, 2-butoxy-

Ummm, ok.  Apparently 2-Pentanone is called MPK which is related to MEK, and that mixes up with alcohol is what Mr. color thinner is. May be I’ll try it when I’m short on the expensive stuff.

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