This is 100g of Potassium Ferricyanide from Photographers' Formulary. It is mainly used in bleach baths, such as a bleach prior to sulfide toning, as well as a component in iron printing processes and dye-toning formulas.
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![Primeval Planet Perlereino [POTE-EN060] Secret Rare](https://img.stsels.shop/64/4557/2025052017/primeval-planet-perlereino-pote-en060-secret-rare.webp)
