Wood Surface Treatments to Prevent Extractive Staining of Paints

A number of water-soluble chemicals including stannous chloride, zinc oxide-ammonia complex, copper chromate, and simple chromium compounds were used to pretreat the surfaces of redwood and western redcedar. Each of these chemical treatments was successful to a degree in preventing .the staining, by water-soluble wood extractives, of subsequently applied water-base latex paints. number of different treating variables were evaluated.

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