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  • $\begingroup$ I don't think you answered the question. The big question here is what is Sulfuric acid carbon? $\endgroup$
    – MaxW
    Commented Apr 27, 2020 at 20:09
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    $\begingroup$ Sulfuric acid carbon does not exist. It may be considered as a mixture of carbon and sulfuric acid, which are two independent substances which can be mixed of course. But I don't see the interest in doing this mixture. This mixture will be corrosive like sulfuric acid. It will never be used for any game for children. Too dangerous. So what for ? $\endgroup$
    – Maurice
    Commented Apr 27, 2020 at 20:39
  • $\begingroup$ Maurice - Sorry, I obviously didn't make my point clearly. The OP asked about Sulfuric acid carbon because someone who worked at a plant where "chalk" was made said that was the main ingredient. I agree that it doesn't seem to be a recognized industrial name. I'm guessing that is just what they call the raw feedstock within that particular plant. i'm guessing also that sulfuric acid carbon is a byproduct of making sulfuric acid or using sulfuric acid in some other industrial process. In other words, the chalk company is buying some other company's industrial waste. $\endgroup$
    – MaxW
    Commented Apr 27, 2020 at 20:49
  • $\begingroup$ @MaxW: still, I think this answer may help OP to dig down to what was actually said and meant in whatever language it was said. $\endgroup$ Commented Apr 29, 2020 at 12:10