How to Apply Washi-Paper-Backed Wood Veneer Sheets
This guide explains how to apply non-adhesive, washi-paper-backed wood veneer sheets to a flat wood-based substrate using adhesive and an iron. It does not cover self-adhesive sheets or products already bonded to plywood.
1. Check and prepare the substrate
MORIKOUGEI has tested this method on flat wood-based surfaces such as plywood and MDF. Check that the substrate is flat and clean, and remove dust and grease. For other materials or previously finished surfaces, check the adhesive manufacturer's guidance and conditions of use.
2. Check the grain direction and dry-fit
Dry-fit the sheets, checking the grain direction and any joints. Before starting the full installation, carry out a trial using offcuts and the actual substrate and materials you intend to use.
3. Apply a thin coat of adhesive to both surfaces
Apply CH7WN adhesive thinly and evenly to both the washi-paper backing and the substrate. Do not apply it to the wood face.
4. Let the adhesive dry
Check that the adhesive has dried and changed from white to clear.
5. Mist gradually and bond with an iron
Apply a fine mist a little at a time, mainly to the dried adhesive. The adhesive is ready when it changes from clear to white and feels tacky. Use a medium iron setting as a guide, and keep the iron moving as you bond the sheet.
Wood expands with moisture and shrinks with heat. Avoid excessive wetting or prolonged heating in one place. Excessive heat can scorch pale-coloured wood.
Steam
Steam is not essential because moisture is added with a spray bottle. You may use it according to the condition of the material, but take care not to add too much moisture.
Protective cloth
On soft woods such as Japanese cedar, a protective cloth can help prevent small scuff marks from the iron. A clean cloth can also help protect pale-coloured wood from dirt. A cloth reduces heat transfer. Test on an offcut to check adhesion and ensure that the wood does not scorch, then adjust the temperature gradually if needed.
6. Check for lifting and re-bond
After bonding, lightly mist the wood surface. Areas that have not bonded will lift. Reapply the iron patiently to any lifted areas at a low temperature, keeping it moving. Lightly mist the surface again and check that no areas lift. Once there is no lifting, let the sheet dry before sanding. If any areas still lift, do not proceed to sanding or finishing.
7. Sand along the grain
Sand along the grain with approximately #240–#500 sandpaper. A higher number indicates a finer grit. Gently remove dirt and small scuff marks using approximately #240, then finish to your preferred fineness. Veneer is thin, so adjust your pressure to avoid sanding through it.
Remove sanding dust with a vacuum cleaner or an air duster. A small amount of fine white dust may become less noticeable after finishing. Follow the finish manufacturer's instructions for dust removal and surface preparation before applying the finish.
8. Choose a finish
Check that bonding, drying and sanding are complete before finishing. First test the colour change and appearance on an offcut.
Beeswax
Beeswax produces a soft sheen while preserving the feel of the wood. Some easy-to-use products are applied thinly, then wiped with a dry cloth to remove the excess. They can help repel light dirt and water droplets, but wipe away water promptly. Formulations and performance vary by product.
Oil finish
Oil finishes preserve the character and feel of the wood. Apply thinly and finish according to the product instructions, which may include wiping off excess oil. Whether wiping is required, the number of coats, colour, sheen, and resistance to water and dirt all vary by product.
Urethane
Urethane forms a film on the surface and is an option when resistance to water and dirt is a priority. “Base coat → drying and sanding → top coat” is one example; some products do not require a separate base-coat product.
Water resistance does not mean that a finish is waterproof or suitable for soaking in water. Follow each product's instructions for the number of coats, drying time and suitable locations of use.
Cloths containing oil-based finishes or waxes may spontaneously ignite if left piled together. After use, follow the product instructions and immediately immerse them in plenty of water for safe handling and disposal.
9. About CH7WN adhesive
CH7WN is a polyvinyl acetate emulsion adhesive that Konishi lists for bonding wood veneer. This guide describes MORIKOUGEI's method, tested on flat wood-based surfaces such as plywood and MDF.
The mist-and-iron technique described here is MORIKOUGEI's method. Water- and heat-resistance performance stated in the manufacturer's documentation for other application conditions cannot be directly applied or guaranteed for this method. Konishi official documentation (Japanese PDF)
10. Installation and results
Results vary depending on the condition of the substrate, the application method and the environment of use. This guide does not guarantee results under every installation condition. We cannot cover repair, reinstallation or similar costs arising from installation faults for which we are not responsible. This does not exclude any responsibility we bear under applicable law, including for defects in the product itself or errors in our instructions.