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Sidero-Cupreatype / Colouring Tannic acid - NH3

Contexte & Histoire

The sample is thoroughly lightened using NH3aq and then coloured with tannic acid. Obviously, the paper fibres are also coloured.
Accéder à la fiche technique

Cards for this variante

Fiche #59
Grey brown Grey yellow Grey green Black Brown Tan / Sable
365nm
#59