|Project by AffineCreations||posted 12-14-2012 05:57 PM||1662 views||12 times favorited||6 comments|
I came up with these coasters as a test for techniques I needed for my Poincaré clock. But they’ve turned out to be a popular inexpensive item. Easy to make and sell well.
They start with a piece of Curly Maple, which I cut into a blank long enough for the four coasters. Using a V-Groove bit, I route shallow grooves for the dividers between the colored rectangles. I cut deeper grooves for where I will separate the blank into the individual coasters.
Using a water-based dye, I dye the whole blank, top and bottom, black. After the dye is dry, sand back the top until only a little bit of dye is left in the curly figure, which at the same time leaves the grooves black. With yellow, red and blue water-based dyes, I paint each of the rectangles. I don’t need to mix the dyes beforehand to get the secondary colors; I just paint the pair of colors one on top of the other. They mix on the wood. Kind of fun to paint blue on top of yellow and see green on the wood. Here is where the black dyed grooves are important: when painting the colored dyes, I don’t have to worry about staying in the lines too much. A little color on top of the black doesn’t show.
At the table saw, I CAREFULLY cut the blank apart into the individual coasters and apply some black dye to the cut sides. A coat of Tung Oil to bring out the figure and let that dry for days. Steel wool back the oil and lots of spray lacquer. I’m liking the Target Coatings' EM6000 Not too expensive, not very toxic and build fast and clear. And I can spray it with a single-action airbrush. A spray gun would be overkill for little coasters. Then some 600 grit wet/dry sandpaper with mineral oil/spirits mix and some steel wool and they have a nice gloss.
-- - Nicholas, Silver Spring, MD http://AffineCreations.com