Re: oxalic acid
Remote Name: 126.96.36.199
Date: 12 Feb 2005
Time: 08:33 PM
Oxalic acid, also known as WOOD BLEACH, is available in many painting supply,
hardware, and flooring stores. Common uses include bleaching floors for
consistent color prior to staining, as well as dark stain removal from oak and
other wood floors. It comes as a white crystalline powder that you dissolve in
hot water. Always wear protective clothing and gloves, as oxalic acid is toxic
if ingested. A readily available product is DAP Wood Bleach. Be sure to follow
the directions carefully. Here is additional information on this product from
the DAP website:
DAP® Wood Bleach by PLASTIC WOOD
• Gently lightens wood
• Excellent for water spots
• Easy to use Packaging: 12oz Color: White
UPC Number: 65072
Order Information: 800-327-3339
Fax Number: 410-534-2650 Also, visit the DAP website at
Product Description: DAP® Wood Bleach by PLASTIC WOOD is an oxalic acid powder,
which when mixed with hot water, produces a bleach for treating uncoated wood.
The bleach gently lightens wood without significantly raising wood grain; unlike
chlorine based bleaches. DAP® Wood Bleach is excellent for bleaching out black
water spots on oak floors. Suggested Uses:
• For the gentle lightening of wood surfaces.
• Ideal for the removal of dark water stains from wooden floors.
Surface Preparation & Application:
• Wood to be bleached must be free of all coatings, waxes and oils. Use
appropriate paint strippers, wood cleaners, sanding or scraping to remove
coatings, waxes and oils.
• Always wear rubber gloves, protective clothing and eye protection when using
this product. Dissolve the contents of one package into 1 gallon of hot water.
Stir thoroughly until all crystals are completely dissolved.
• Apply the hot solution with a scrub brush or old paintbrush. On larger jobs
use a mop. Apply liberally allowing the solution to remain on the surface until
it is bleached to the desired lightness. If the solution cools before the job is
finished, reheat but do not allow the solution to boil.
• Rinse the bleached surface repeatedly with clean water and allow it to dry.
Test the removal of bleach from the dried wood by wiping it with a dark colored
cloth. Check for powder residue. If powder persists, rinse the surface again
with clean water and allow to dry.
• Sand wood and finish with desired product.