Question

WHICH CHEMICAL IS USED IN BLUEPRINT??​

Answer 1

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The term "blueprint" is usually used to describe two printing methods, the blueprint and the diazotype. Blueprinting is the older method, invented in 1842. The drawing to be copied, drawn on translucent paper, is placed against paper sensitized with a mixture of ferric ammonium citrate and potassium ferricyanide.

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Answer 2

Ammonium Ferric citrate

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