EEVblog Electronics Community Forum
General => General Technical Chat => Topic started by: ELS122 on September 13, 2022, 04:41:50 pm
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Excuse me posting a non-electronics thread in an EE forum, but I think most electronics projects would require paint at some point. And I could call it an electronics topic thread by saying "conductive dyes for better EMI shielding? ??? ??? "
;D
anyway, does anyone know what were typical white pigments/dyes used for white lacquer, specifically automotive nitrocellulose lacquer.
my first thought was lead carbonate, but was it used for lacquers too? not just oil paints?
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Yes you used lead carbonate, though more modern ones use titanium dioxide instead, as it is a lot less toxic, and more reflective as well. You just have to use a lead paint tester on the old paint to see just how much lead is in it.
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Yes you used lead carbonate, though more modern ones use titanium dioxide instead, as it is a lot less toxic, and more reflective as well. You just have to use a lead paint tester on the old paint to see just how much lead is in it.
Actually it seems not, I found this article: https://www.curbsideclassic.com/automotive-histories/automotive-history-the-long-road-to-the-white-car-part-2/ (https://www.curbsideclassic.com/automotive-histories/automotive-history-the-long-road-to-the-white-car-part-2/)
it was the early 1920’s, when DuPont had begun to develop titanium dioxide.
DuPont’s work was necessary because there was no suitable pigment for sprayed-on white automotive paint.
All of the other white pigments (lead, lithopone and zinc, being the main ones) brought traits that made them poor choices for automotive finishes on mass production vehicles.
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Titanium Dioxide didn't really see widespread use until the toxicity of lead became better known, probably because of cost. So up until the 1960s or so, anything that's painted white might still have used lead carbonate as the pigment. Not everything needs automotive grade paint.