How to Eliminate the Ink Stamp on Pressure Treated Wood

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Removing ink stamps from pressure treated wood can be done using various methods. One effective method is to apply rubbing alcohol or acetone onto a cloth and gently rub the ink stain. Another option is to use a mixture of baking soda and water to create a paste, apply it to the stain, and scrub with a cloth. Additionally, using a commercial ink remover or sanding the area can also help remove the ink stamp. Remember to test any method on a small, inconspicuous area before applying it to the entire stain to avoid damaging the wood.


The ink stamp found on pressure treated wood represents the sawmill where the wood was processed. It also provides information about the wood grade, species, and other relevant details. Although informative, mill stamps leave an undesirable mark on the wood.


How to Eliminate the Ink Stamp on Pressure Treated Wood
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The ink stains on pressure treated wood are water-based. Over time, these stains will naturally fade away. Exposure to rain, snow, and foot traffic will cause the stains to gradually disappear. However, if you prefer not to wait for the elements to remove the ink stains, there are alternative cleaning methods you can try.

Covering the Stains with Paint

If you are planning to use an opaque paint or stain on the pressure treated wood, you don’t need to worry about completely removing the ink stain. Simply paint or stain the wood as you normally would, following the grain of the wood. You may need to apply two coats for the stain to completely vanish.

Removing Ink Stains from Pressure Treated Wood

In some cases, you may be able to scrub the ink stain off the wood. However, the ink stain can sometimes penetrate deeply into the wood and may not come off easily. While wearing gloves, dip an abrasive sponge or steel wool in diluted bleach or Borax. Scrub the surface of the wood until the ink is no longer visible. You may need to repeat the process of dipping and scrubbing several times until the stain is completely gone.

Sanding Off the Ink Stain from Lumber

Sanding can be an effective method for removing ink stains. Using 80-grit sandpaper, gently sand the stain. Sand in the direction of the wood grain until the ink is no longer visible. Once the stain is gone, wipe the area clean with a damp cloth to remove any sawdust. Some carpenters recommend running the wood through a planer to remove the stain and using sandpaper to smooth out any roughness.

Using Oxalic Acid

Oxalic acid is a “wood brightener” or bleach. Although it is typically used for removing dark spots from older wood flooring, some people also use it to eliminate ink stamps. Due to its strong chemical properties, it is important to handle and use oxalic acid with caution. Always wear gloves and a mask, and work in a well-ventilated area.

Apply a small amount of oxalic acid onto a scouring sponge and rub it into the stain. Allow the chemical to sit on the stain for approximately 10 minutes, then wipe it off with a clean damp cloth. Repeat the process as necessary.

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