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Old 12-04-2017, 08:28 AM
patchmcg patchmcg is offline
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Join Date: Jun 2007
Location: Steeler Nation
Posts: 2,008

Here's the latest update posted yesterday. Dan mentions that the parlor bowl is made of "unobtainium" (A cool word to be sure), and he is right. This may well be the last of those which were made way back in the 90's.

The molding process has begun. Because I'm using a different brand of epoxy than I normally use I decided to mold my deep bowl first. This way, if there's any problems Patch's parlor bowl is still safe. (Made from unobtainium)

First step is to apply the surface coat. This is similar to a gel coat, but with thickened epoxy instead of polyester resin.

I'm sure you've noticed the difference in color between the treble and bass bouts. I'd originally planned to add some yellow dry artist pigment to the surface coat so that I could see the difference between the white surface coat and the parting plate. But, because the PVA is tinted green, this is really unnecessary. Also the surface coat is really thick, so blending in the pigment was a royal pain in the butt.

Next, a fillet of surface coat is laid into the joint of between the bowl and the parting plate. This is done for two reasons. First, it adds strength to this area of the mold. Second, the cloth doesn't really want to conform to a sharp angle, so this helps prevent voids from forming during the lay-up.

First layer(s) of 5-oz. cloth are laid-up.

Final layer(s) of 17-oz. bias knitted cloth are on the plug. I'll let the epoxy cure for 24 hours, then I'll separate the plug and mold.

Well, it looks like one of those desiderata days.....

Spruce: Patriot #76, 1768-7LTD, 1122, 6774, 1779 USA, 1657-Adi
Redwood: 2001-X, 1537-X, 1713-X, FD14-X, Dan Savage 5743-X
Koa: 2078LXF, 1768-X, 1997-X
12-string: 1755, 1615-X Walnut
Exotic tops: 1768-XWF (Bubinga), 1987-M (Mahogany), Adamas 1681-X (Q. Maple)
Others: MM-68-7LTD Mandolin, MM-868-X Mandocello
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