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If you are looking to "develop" your own paper chemicals from scratch, you can use common household items or traditional chemical formulas: Make Your Own Paper Developer

: Removes the unexposed silver salts so the paper is no longer light-sensitive and the image becomes permanent. Time : 2 minutes for RC paper; 5–6 minutes for FB paper. ШЄШ­Щ…ЩЉЩ„ wajiha1 doc

: A weak acid that immediately halts the action of the developer to prevent over-development. Time : Approximately 30 seconds. If you are looking to "develop" your own