Hi,
Maybe an explanation of my objectives for the guns above might help you understand why I chose to mix primary colors of aniline dyes. The pistols were stocked in American black walnut but I wanted to match the color of English walnut I observed in several pairs of original English pistols that I handled. Black walnut often has a purple-brown undertone that is cold. I gave the pistols a wash of yellow dye, which wiped out the purple tone and gave the stocks the exact rich reddish brown that matched the originals. The ornate fowler is cherry but I gave it a dilute wash of scarlet and orange aniline dye to match the color of an apple wood stocked wheellock displayed at the NY Metropolitan Museum of Art. The next rifle was given the same treatment as the pistols to make the black walnut match the color of my original English percussion double. The pistol case is Honduras mahogany given a orangy-brown wash to bring out the richness of the natural color making it look more like Cuban mahogany, the king of furniture wood. It darkened over time and now is an exact match to the antique Cuban mahogany furniture in the owner's home. The maple-stocked rifle was given a wash in scarlet dye and then a rich mahogany brown applied on top. I used the dyes because at the time I could not get nitric acid flown in to my home (at the time) in Alaska and did not know of ferric nitrate crystals. The rifle is currently used a lot by its owner in Idaho without trouble fading. Each gun had an objective and dyes were the best way to achieve them with the exception that acid stains are best on maple or woods without a lot of tannin. With respect to acid stains on maple, I believe ferric nitrate crystals give the best color control, although it is always something of a $#@* shoot and depends on the wood. Finally, I am not sure why some folks seem to have trouble applying aniline dyes. Maybe oil or alcohol-based dyes are more difficult, but my water-based colors are easy to apply, stain deeply and evenly, and give me maximum control of color.
dave