Hi Greg,

I believe that the lead in paint is often in the form of lead acetate which
is more soluble in water that the oxide and more unfortunately sweet to the
taste of unwitting children (hence one of its common names "lead sugar" and the
prime cause of our industry's current woes of conversion). I suspect that this
makes the testing a bit easier for hardware store kits.

I am reminded that lead acetate was used by spies during the US Revolutionary
War for invisible ink and sulfer/sulfite was the developer.

Very best,
Joe

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