Q: I want to paint my wood desk with an alcohol soluble aniline dye. I heard that an aniline dye may require a mordant to improve the fastness of the dye. 
A: Mordants are necessary with some natural dyes, and with certain dyes made for cloth. However, the dyes sold specifically for coloring wood are all made so that they do not require a mordant. Simply mix the dye to the concentration you like, flood it liberally onto the wood, then wipe off all that has not been absorbed by the wood.
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