Thanks to Eli's suggestions and Cal suggesting I contact Rob Millard, we got the tambour doors done. We ended up using cotton duck canvas. With 2 washes, 2 dryings and quite a bit of preliminary ironing the canvas has worked fine. As per Rob's instructions
http://www.americanfederalperiod.com/T%20desk%202.html the tambours went quite well. My brother wanted to alternate the strips similar to some of the Seymour pieces found in the Mussey book. To get look he was after I showed him how to quarter saw maple and mahogany for grain pattern. I took some 7/8" maple stock about 14" long and 6" to 10" wide. Looking at the end of the board, I found where the grain ran straight along the 6" to 10" width. When you cut through that part of the board you get the stripe pattern. To get the strips to the 1/4" x 3/8" size and not loose fingers in the table saw I used the following procedure; run the board through the jointer on the 7/8" side to get a clean edge. Set the table saw fence to 3/8" and raise the blade to 1 1/4" to 1 1/2". Run the board through the table saw on it's freshly jointed 7/8" edge. now you have a board that is split but you can still run safely through the table saw. Reset the fence to 1/4" and set the blade height to slightly less than 3/8". Run the board through on the flat on both sides, this will give you 2 pieces that are 1/4" x 3/8" and still attached to the main board. Now take a sharp knife and slice the two pieces from the main board. By doing it like this you get the desired grain pattern for the show face. Now back to the jointer to start the procedure again, continue until you've cut enough pieces to have the necessary number plus 5 to 10 extras. The jig I made to hold the doors is very simple. I figured the width of both doors and then added 2". I took a piece of 3/4" cabinet plywood and set up a 90 degree fence across the top and on one end of the plywood using 1/4" MDF. I used the measurement for the 2 doors plus 2" and attached another piece of 1/4" MDF at a 90 degree angle at the other end of the plywood. The strips must be prefinished on the face(3/8") and 2 sides(1/4") before gluing the tambour fabric(see Rob's link for detailed instructions). Insert the pieces into each side of the jig face down. Cut a piece of 1/4" MDF that is slightly wider than the center gap. When you push this in the center of the 2 doors it will hold al of the pieces tight to each other. The center piece might need to be trimmed a couple of times to get the correct fit( so that the pieces are tight to each other but so they lay flat and don't pop up). Apply the hot hide glue to the pieces, let it cool, place the fabric on the doors and use an iron set on low heat to liquify the glue.
Hope this makes sense!
Chris
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