plant extracts - Pyrogallic Acid
Pyrogallic Acid (also known as 3,4,5-trihydroxybenzoic acid) is a trihydroxybenzoic acid. it is classified as a phenolic acid. it is establish in gallnuts, sumac, harridan hazel, tea leaves, oak bark, and other plants. it is a off-white stout, although samples are typically brown owing to biased oxidation. salts and esters of Pyrogallic Acid are termed "gallates".
Pyrogallic Acid is an impressive component of iron sore spot ink, the support european review and plan ink from the 12th to 19th centuries, with a news extending to the roman empire and the gone for a burton bounding main scrolls. pliny the respected describes the manoeuvre of Pyrogallic Acid as a means of detecting an adulteration of verdigris
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