Coloring of porous material by means of an aqueous solution of furfuryl alcohol, a catalyst selected from a compound of iron, nickel, cobalt, copper, zinc and cadmium, and a complexing agent. Specifically, inexpensive elm veneer is colored to resemble the more expensive walnut.
A process for coloring wood whereby the resulting color will not change or substantially fade upon exposure to long term environmental weathering, which process comprises contacting the wood with an aqueous solution containing 0.01%-10% of an iron salt derived from a mono-, di-, or tri-carboxylic acid or a mono-, di-, or tri-carboxylic hydroxy acid containing 1-6 carbon atoms. The iron salt solution of this invention may be used to color nontreated wood as well as wood treated with known preservative compositions containing one or more heavy metals including copper, chromium, arsenic and zinc.
A furan polymer impregnated wood which comprises wood impregnated with a polymerizable furfural alcohol monomer solution containing at least water, stabilizers, and furfuryl alcohol, and at least one further compound selected from the group consisting of anhydrides, acids and combinations thereof is described.A method for preparing a furan polymer impregnated wood and uses thereof is also described.
