by Bo Riley
So, you have finished the cabinet making phase of your spinet harpsichord
project...and you are not happy with the color contrasts in veneer. Is there a small
amount of sapwood streaking through your beautiful solid mahogany lid? Were you hoping for
something a little lighter, or darker? Does your lid look like it should be attached to
someone else's spinet case? If you have answered yes to any of these questions, read on.
Aniline stains have been used with great success on furniture since the
19th century. They also work well when applied to your spinet harpsichord. Most
woodworking stores and some hardware stores carry this material. It comes in powder form
in shades of red, black and brown, soluble in either water or alcohol. Most important for
our purposes, is the water-based variety. The water base is critical because subsequent
finishing steps require alcohol and oil. Thus, it is essential that one not interfere with
the other. This stain works so well because it is essentially transparent. Therefore it
won't detract from the natural beauty of the wood. By reducing color contrasts it will
appear to simultaneously make darker woods lighter and lighter woods darker.
Before applying the stain, prepare the surface of your spinet by sanding
to a fine finish. Then brush with water. Leave no standing puddles but wet well. Let dry
completely, then sand again lightly to remove the water-raised grain. If you do not want
the light color of your maple or boxwood stringing to be affected by the staining it will
be necessary to protect it. Carefully apply at least two coats of shellac with a Q-tip
swab prior to applying the stain. At this point make certain that you have at hand sample
pieces of the same color and species of that to be stained. You can make samples from your
scrap veneer glued to scrap wood. Mix the powder with water according to the container
instructions. You will probably want to experiment by mixing several colors to achieve
exactly what you want. Aniline is not expensive and a little goes a long way.
Application is straightforward. Aniline stain behaves on a dry surface
exactly like water colors when painting. To achieve an even coating it is therefore
necessary to do as the artist would and pre-wet the surface, being careful not to leave
standing puddles of water. Begin to apply the stain with a good brush. Be quick and clean;
do not splash your soundboard. Wipe excess moisture with a damp cloth. The moisture will
raise the grain again, but much less so. The dried surface will seem dull. The final look
of the piece can be estimated while the surface is still wet. When the surface is
completely dry, sand very lightly with fine paper taking care not to concentrate in one
area more than another because the surface will look uneven. After the last light sanding
more finish may be applied (again on a pre-dampened surface) or you may start the French
polishing process.