Darryl Keil Last Activity 2025-09-09 11:09 AM
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Ed Harbur

Posts: 1

Joined: 2003-12-11
Location: Ridgefield Ct

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Subject : Compound Curve Veneering and GF 20
Posted : 2003-12-11 3:00 PM
Post #31123
I'm trying to veneer a compound curve with Birdseye Maple, and am not having much luck. I've got some GF 20, which I gather is more of a veneer relaxer than a flattener, and seems like what I'm after, but it came with no instructions, and I don't have any idea how to use it. Any thoughts?

I tried moistening the veneer to varying degrees, but when I got it wet enough to make the curve, it expanded substantially - about 8% across the grain, and I'm worried about gluing it down in this condition, and what will happen as it dries and shrinks.

Thanks, Ed



 
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Darryl Keil

Posts: 1455

Joined: 2003-05-22
Location: Maine

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Subject : RE: Compound Curve Veneering and GF 20
Posted : 2003-12-12 11:17 PM
Post #31125 - In reply to #31123
Ed,

If you need to get the veneer fairly wet with GF-20 to achieve your bend then I would press it wet without glue and use newspaper to dry the veneer on your compound shape. Change the paper 4 to 6 times or until the veneer is dry again. It should hold the shape at least fairly well once its dry. Then you can glue it without compromising the glue joint and the veneer will be shrunk back to original size.

GF-20 is usually thinned 50% with water. Brush it on your veneer liberally, both sides.

Sincerely
Darryl Keil




 
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John Ersing

 
Subject : RE: Compound Curve Veneering and GF 20
Posted : 2003-12-16 2:27 PM
Post #31130 - In reply to #31123
If you received the GF-20 from us at Veneer Systems, I apologize to you for not receiving the instructions for use. They are to be packed with each shipment.

Here they are for your use.

Regards,
John Ersing

Application and Usage

GF-20 - Veneer Softener
A solution to treat crotch or burl veneers and other difficult veneer with similar characteristics. The GF-20 temporarily plasticizes the cells of the veneer making them more flexible and pliable.

Recommended Procedure
Mix the GF-20 with water to a maximum of 1:1 dilution. Adjust concentration dependent on the characteristics of the veneer. Apply the solution by dipping, spraying or brushing. Make sure you obtain 100% coverage.

Allow the veneer to stand until the surface appears dry. Generally this will take 10 to 20 minutes. After they appear dry, separate the leaves with kraft paper, sandwich them between 3/4 in ply or MDF with some weight on top and allow them to dry overnight. If possible, apply heat to the veneers for better plasticizing. This can be done by either placing the veneer in a hot press, one or two leaves high for about 30 to 45 seconds or place it between heated boards. For smaller jobs cover the veneer with kraft paper and apply an iron at medium / high heat. The softening effect will work with or without heat.

NOTE:
The plasticizing effect only lasts 24 to 48 hours so it is not possible to prepare raw material several days in advance. This is a combustible liquid. Keep away from fire, flame and all sources ignition. Provide adequate ventilation at all times to prevent buildup of vapors. Store in a tightly sealed container in a cool dry place.



 
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gepetto

 
Subject : RE: Compound Curve Veneering and GF 20
Posted : 2003-12-17 2:28 PM
Post #31135 - In reply to #31123
if you are still having problems with your compound curve...sometimes you are just reaching the limits of that curved piece.

It is good practice to incorporate some relief in the component you are making. you can only go soooooooo far with compound curves.

creating a wedge or slit of some kind works great for chair backs and other components
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