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Paul M. Roche Etching Washington Monument: Acidity Removal Process
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<p>[QUOTE="wlwhittier, post: 4496171, member: 76316"]My go-to chemistry is most often Sodium Percarbonate* crystals. It produces Hydrogen Peroxide when mixed with water. Excellent for removing organic material, and it can be mixed as weakly or strongly as you please. Cheap in moderate quantities, stores well, and nowhere near as aggressive as Sodium Hydroxide. It has a mild, inoffensive odor even in strength. After a few trials, you won't want to be without some.</p><p><br /></p><p>*It's the functioning ingredient in OxyClean.[/QUOTE]</p><p><br /></p>
[QUOTE="wlwhittier, post: 4496171, member: 76316"]My go-to chemistry is most often Sodium Percarbonate* crystals. It produces Hydrogen Peroxide when mixed with water. Excellent for removing organic material, and it can be mixed as weakly or strongly as you please. Cheap in moderate quantities, stores well, and nowhere near as aggressive as Sodium Hydroxide. It has a mild, inoffensive odor even in strength. After a few trials, you won't want to be without some. *It's the functioning ingredient in OxyClean.[/QUOTE]
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