Notes & Queries. (1847) Coloring Ratan Black.

The Manufacturer and Builder 6, 1877

Use the same prescription as for wood. First, a hot and strong solution of extract of logwood; let it dry, then brush it off, and use a weak solution of bichromate of potash; let it dry again; when grayish spots appear, brush and rub the ratan, and if not satisfactory repeat the operation. The color obtained is "fast."

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