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Darryl Keil
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Dear Kim,You dont always need two ply when doing curved work but under some circumstances it can be useful. For example, 3/8" bending ply is too rough to veneer directly onto in my opion soa sub veneer is needed between the face veneer and bending ply. Rather than pressing thesub veneer onto the bending ply and then pressing the face veneer on top of the sub veneerI would press the two veneers together first, in the flat. There are three advantages, first, after the two veneers have been pressed up 90 degrees to each other you can check forany bad spots and turn the two ply over making repairs from the back side with no damage tothe face. Second, when you press this two ply onto the curved door, if there are any spotsthat do not bond properly they wont show through to the face veneer because a two ply isstiff enough to span these small areas. Third, a two ply can be sanded in the flat on your bench rather than on the curved surface which would usually be more difficult.On a smooth door face you do not necessarily need to make a two ply and I might skip the extra step myself, but I will say that making a two ply just about guarantees a sucessfull lay up on curved workSincerelyDarryl Keil: Dan -: Thanks for the info. : Re: how do I know I need a 2 ply? I guess don’t know why I need one. I was following Darryl’s suggestion in his tape.: We have two applications - which I guess are essentially the same application. Veneering over a pre-bent plywood door and veneering over a door we made ourselves in a form with pending ply. Why do you need a 2 ply? Is it only when the grain of the veneer will be parallel to the grain of the last ply of the substrate?: Thanks,: Kim Carleton Graves: Carleton Woodworking
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