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GW
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When I need plywood I'm lucky enough to be an hour from Tree Products, a hardwood/sheetgoods supplier that gets a lot of their domestic plywood from States Industries just down the road.
States makes Appleply plus 5 and 7 ply domestic maple plywood. I buy shop grade to build cabinet boxes and it is better than the on grade stuff almost anyone else sells plus it's an inch longer and wider than a standard panel.
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Robert Adams said:
Little of it is flat. Even the good stuff from the plywood suppliers isn't flat or it is when you get it then as soon as it gets home it warps. Baltic birch though is pretty flat most of the time. The only stuff that starts flat and generally stays that way is mdf.
That is why I use mdf with the hard plastic on both sides (Do not remember what it is called) as sleds or templates.
Arlin
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Arlin Eastman said:
[blockquote]Robert Adams said:
Little of it is flat. Even the good stuff from the plywood suppliers isn't flat or it is when you get it then as soon as it gets home it warps. Baltic birch though is pretty flat most of the time. The only stuff that starts flat and generally stays that way is mdf.
That is why I use mdf with the hard plastic on both sides (Do not remember what it is called) as sleds or templates.
Arlin
[/blockquote]
Arlin, try to remember what that stuff is called, because I'm interested and have never heard of such a product. The only thing similar that I know of to what you describe is Melamine, but that has a particle board core. Thanks.
John
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They make a phenolic-faced version of MDO / HDO,
http://theplywood.com/mdo-hdo though with the internal structure that has more to do with weather resistance. Standard is a kraft-paper like surface. Been doing for my router table and such for years. Shellac and wax for slick.
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jteneyck said:
Arlin, try to remember what that stuff is called, because I'm interested and have never heard of such a product. The only thing similar that I know of to what you describe is Melamine, but that has a particle board core. Thanks.
John
The DIY answer is plastic laminate veneered to MDF.
I did not go looking but I expect someone makes it commercially
someone else was looking for a ply core for structure and screw holding ability and the flat surface of MDF
They make that as well it has a ply core two faces of MDF to veneer to and the veneer itself over that...
I have only seen it in 3/4" however.
Joe
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White Cap Supply has phenolic plywood. It is used for concrete forms. I personally have not bought or used it. However, there have been numerous articles written about using it for jigs and fixtures. Most all list White Cap as a supplier. Just an FYI.
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I've been in the plywood manufacturing business for over 35 + years now and their is no plywood that stays absolutely flat.With the moisture in the air and the dryness,it's always on the move so to say.The only ones that stay relatively flat are MDF,Lumber Core, Baltic Birch,and Combi Core.
Johner
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Thank you from the perspective of hands on, and years in experience.
Welcome to the forum.
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GW
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I stopped buying sheet goods for furniture from the big box stores a long time ago. I spent 2-3x for quality sheet goods at specialty lumber outlets. It's worth the cost. MDF is the only exception, but I don't use MDF for furniture anyway. I do use 1/2" MDF occasionally for veneered panels on boxes. It's a nice, stable substrate. The last ply I got from a big box store ended up as flooring for a shed I built.
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