Best answer
To bleach stains from the surface of wood, mix28-30 grams of Oxalic acid crystals with one cup of hot water, and leave it to dissolve completely. Using a brush, apply the mixture on the surface of the wood you wish to bleach and leave it to dry, make sure to cover all the area evenly.
People also ask
Why is oxalic acid used as a bleach?
Oxalic acid has many uses, but it is widely used as a wood bleach because it removes stains without removing the natural color of the wood.
Can you use oxalic acid to remove stains from wood?
If you are unsure what caused the stain, try oxalic acid first. If it is completely unsuccessful, then consider other types of bleach like an A/B or chlorine bleach. Oxalic acid has many uses, but it is widely used as a wood bleach because it removes stains without removing the natural color of the wood.
What type of Bleach should I use to bleach wood?
If it is completely unsuccessful, then consider other types of bleach like an A/B or chlorine bleach. Oxalic acid has many uses, but it is widely used as a wood bleach because it removes stains without removing the natural color of the wood.
Is oxalic acid safe to use on oak?
A/B bleach is extremely caustic and will quickly burn your skin and eyes. Iron, in the form of nails, hardware, or even bits of steel wool, often leaves a blackish stain on woods high in tannin, like oak. A wash of oxalic solution removes these stains as well as the grayed color of oxidized wood.