Darryl Keil Last Activity 2025-09-09 11:09 AM
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Stephen Bodner

Posts: 5

Joined: 2004-08-11
Location: Pittsboro, NC

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Subject : softening veneer
Posted : 2004-08-11 7:28 AM
Post #31714
I want to glue crotched mahogany veneer to a backer veneer, and then apply the two-ply over a curved surface. I assume the flattening solution is the correct way to first soften the crotch veneer. Do I still start by drying the veneer for three days with fiberglass and newspaper, or would it be better to only partially dry it, so it will be softer and easier to bend? What is the time window for bending this crotch veneer before it gets too stiff? How dry does the crotch veneer have to be before I use it with the urea glue?


 
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Darryl Keil

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Joined: 2003-05-22
Location: Maine

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Subject : RE: softening veneer
Posted : 2004-08-11 8:42 AM
Post #31716 - In reply to #31714
Stephen,

What's the radius of your curve?

Sincerely
Darryl Keil


 
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Stephen Bodner

Posts: 5

Joined: 2004-08-11
Location: Pittsboro, NC

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Subject : RE: softening veneer
Posted : 2004-08-11 11:00 AM
Post #31717 - In reply to #31716
Most of the places have a radius of curvature of about six or seven inches. One section where I would also like to put a crotch veneer has a curvature radius of about three inches.


 
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Darryl Keil

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Joined: 2003-05-22
Location: Maine

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Subject : RE: softening veneer
Posted : 2004-08-12 9:22 AM
Post #31719 - In reply to #31717
Stephen,

You really want your mahogany crotch as dry as possible before making the two ply. Once its glued down to the backer veneer it wont be any more flexible dry or damp.

With the radiuses you are looking at you have a window from pressing up the two ply to pressing it on your curved part. In general you need to do both on the same day. Lets say, first thing in the morning for the two ply and late afternoon for the second pressing. If your in a hot climate and its in the 90's in your shop then probably around mid day for the second pressing. This is assuming your using the Unibond 800 glue.

Sincerely
Darryl Keil


 
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Stephen Bodner

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Joined: 2004-08-11
Location: Pittsboro, NC

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Subject : RE: softening veneer
Posted : 2004-08-12 12:55 PM
Post #31720 - In reply to #31719
I am still worried that the crotch veneer will become brittle and will not bend. Is it better on curved surfaces to not use a backer veneer and simply tape up the crotch veneer and other veneers and apply them directly to the curved surface? And would it be better to do this while the crotch veneer is still a bit damp and flexible? I suppose I could check this out by testing one crotch veneer sheet and see if the glue holds.


 
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Darryl Keil

Posts: 1455

Joined: 2003-05-22
Location: Maine

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Subject : RE: softening veneer
Posted : 2004-08-14 11:22 PM
Post #31721 - In reply to #31720
Stephen,

Your radiuses are not that tight for using a backer with the crotch, provided you press it on your curve the same day you press up the two ply. If you were to do a test, I would recommend trying the two ply test and see how that goes.

With mahogany crotch I really would stay away with leaving the veneer damp, even to a slight degree. Your asking for problems down the road with fizzuring and cracking.

Sincerely
Darryl Keil


 
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Stephen Bodner

Posts: 5

Joined: 2004-08-11
Location: Pittsboro, NC

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Subject : RE: softening veneer
Posted : 2004-08-18 7:41 AM
Post #31722 - In reply to #31721
Thanks. I tried a test piece and your suggestions worked perfectly.
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