Stains # 421 and # 422 – antique gray-brown are ready-mixed oxidation stains. After application, the color changes under the effect of air and daylight from being colorless(421)/orange(422) to antique gray-brown. This stains are applied exactly as described above. Once the required color has been reached, gently sand with a fine sandpaper and apply 1 coat basic varnish. This prevents further modification of the color. Ideally, one should carry out a test stain and varnish to see what the final result will be, since the colors will vary with different types of wood. This stains particularly draws out timber rings.
Stain 422 is toxic.