I’m building a veneer project using the sandwich substrate recommended in Craig Thibadeau’s “ Craft of Veneering” book. Flat panels will be composite of 3/4” birch plywood surfaced with 1/4” of mdf two sides.
The only mdf available locally has a rough side and a slick side. New to me, it’s usually same on both sides. I recall reading someplace a schedule for prepping the slick side. But I can not find the article. Can someone remind me how to prep the slick side to properly take PVA glue?
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Why not just use contact cement?
Believe pva glue will give me a better bond between porous materials. Contact cement is flexible. Better on non porous materials.
What you have is tempered hardboard which, while similar to MDF, does have different makeup and working properties than MDF. Unfortunately I can't shed any light on its suitability for your needs, but maybe searching the site or web for hardboard will provide an answer.
I appreciate your response. But I don’t think so. Tempered hardboard is dark in color from the extra heat and pressure. This material looks like mdf but has a slicker surface.
Obviously I can't see it but the waffle back and slick surface are all indicators of tempered hardboard.
Who said there was a "waffleback"?
No waffle back. Just regular mdf roughness on one side. Kind of slick the other. But not like it has been treated with linseed oil. Which makes some MDFs water resistant. I’m thinking maybe it needs sanding to ensure glue is absorbed.
I sprayed water on the slick side. It beaded. I sanded lightly with 120 grit. Gave the mdf an absorbent surface. I have first panel in clamps. Looks like it’s working fine.
I imagine anything that will break the glaze should work.
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