Clearing Dichromate Staining

Clearing Dichromate Staining

On occasions I find that some of my gum prints are stained yellow, which does not come out with washing. This is due to the dichromate being trapped in the paper or somehow attached to the surface of the paper. This is a well recognised phenomenon and the recommended treatment is to clear it with sodium metabisulphite.

These notes were taken while I tried this clearing technique - see how well it worked.

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