How to Flatten Curled Veneer: Tips and Techniques

Veneer is a beautiful and versatile material used in woodworking projects, but it can be challenging to work with when it arrives curled or wavy. Fortunately, there are several methods to flatten curled veneer and prepare it for your project. In this article, we’ll explore the best techniques to get your veneer flat and ready to use.

Flattening with a Household Iron
For minor, isolated instances of flattening, a household iron can be an effective tool. Set the iron to the steam setting at about 150°F to 212°F. Then, apply gentle pressure as you iron both sides of the veneer. The steam will increase the veneer’s moisture content, making it flexible enough to flatten.

Using a Veneer Softener

If the veneer is too wavy for an iron, you can spray the sheet with a mixture of water, alcohol, and glycerin, sometimes called a veneer bath. This solution will soften the veneer and keep it flexible during glue up. A common spray bottle is the right delivery tool. All it takes is a light misting on both sides to soften the veneer just before glue up.

Soaking and Pressing

If the veneer is excessively wavy, you will need to thoroughly soak each sheet in a veneer bath and then press the veneer between two boards until dry. For this case, Tage Frid formulated a classic recipe: 3 parts water, 2 parts plastic-resin glue, 1-1/2 parts glycerin, 1 part alcohol, and 1 part flour.
After the veneer has soaked in the solution for about 30 minutes, press each sheet individually between two sheets of plywood with about 10 lb. of weight applied. Also, place ample layers of newspaper on each side of the veneer to absorb the water. As the solution dries, you will have to change the paper two or three times to allow the water to slowly evaporate out of pressed veneer sheets.
Once flat and dry, the sheets should be kept between boards or heavy cardboard weighted with bricks until used. In fact, this storage setup is recommended for all veneers.