Before trying any bleach it’s always worth trying to sand the offending wood stain clean, sometimes it is surprising how little material must actually be removed. Removing Black Stains in Wood Furniture With Oxalic Acid: Iron oxide stains in wood are usually dark spots caused by prolonged exposure to water and / or metal. Oxalic acid is unique in that it will remove a certain type of stain formed when iron and moisture come into contact with tannic acid in the wood. I sanded the waterproofer off the faded and stained areas, then applied the wood bleacher, using several coats for the worst areas. Oxalic Acid Wood Bleach. Oxalic Acid for Wood Bleaching. Use on unfinished or stripped wood… May cause burns. In stock . Use on all unfinished woodwork, floors, doors. Do Not breathe dust. Oxalic Acid helps bring back the original color of your wood. "Bar Keepers Friend" is a very cheap multi-surface cleaner containing oxalic acid dihydrate, available at hardware stores. For example, the quickest way to find oxalic acid is to search for wood bleach. It is often labeled as “Wood Bleach”, and it’s easy to mistakenly order oxalic acid when what you really wanted was a two part bleach. Oxalic acid is a natural organic compound. I use smaller quantities so mix 1/4 pound to a quart of hot water. Oxalic Acid / Wood Bleach. Oxalic acid is a great method of treatment for controlling varroa mites in a colony when used in conjunction with a Vaporizer such as the Provap110, Varrox, or any other Vaporizing tool. At times you may remove the floor finish and still find a black or deep brown pet urine stains marks in the wood. The Many Uses of Oxalic Acid. For humans, oral and topical applications of this acid are highly toxic to the body due to its bleach-like and corrosive properties. 100g to 25kg packs Because of its properties, people often use oxalic acid for both cleaning and bleaching of various surfaces. For me, this is late fall. Oxalic Acid works on bare wood, so the first step to using this formulation is cleaning your surface... Mixing Oxalic Acid. How to Use Wood Bleach Cleaning Surfaces. Here's the technique I used:-- Time of application --1. http://www.constructionchemicals.co.uk/acatalog/joinery_products.html - how to use oxalic acid to remove stains from timber. It naturally occurs in vegetables such as sorrel, spinach, and rhubarb. In fact, even Certified Naturally Grown beekeeping allows the use of oxalic acid for the treatment of Varroa. It is when oxalic acid is cooked or processed that it becomes inorganic and toxic. Wood bleach is oxalic acid and that's exactly what you need to treat your hive for varroa mites. Oxalic Acid does amazing things to dull, old and lifeless wood. Mix 1 pound of oxalic bleach crystals to 1 gallon of hot tap water. The toxic version of oxalic acid is used as a bleaching agent on wood. Keep out of reach of Children. Oxalic acid, also known as ethanedioic acid, is a naturally occurring compound which is found in many different types of vegetables.In its solid form, it is colorless and has the appearance of a white crystal substance when purified. Check the ingredients label, or call the manufacturer to make sure there are no added ingredients. Oxalic Acid: To know how to bleach wood floors using oxalic acid, follow these steps: #4: Sand your hardwood floor or use a chemical stripper to get the finish off it. Lab reagent. Directions Oxalic acid works like bleach to renew a redwood or cedar fence. OXALIC ACID 99.6% Pure, 5 Lbs, Rust Remover, Wood Bleach and More

Oxalic acid's main applications includes cleaning or bleaching, particularly for the removal of rust from metal. It was, as you say, years ago and your memory may be playing a small trick. Expectations: When iron is in contact with tannin in wood it produces a dark stain in the wood. Some woods like oak, cherry and mahogany naturally contain a high amount of tannic acid and a black stain is formed when the wood gets wet with tap water (tap water contains iron as a trace mineral). Dissolve 0.06 liters (2 oz.) to lighten wood or match different wood … Oxalic acid is the one to try first, then if that doesn’t work chlorine and as a last resort one of the two part peroxides. Oxalic Acid Wood Bleach. I do believe that oxalic acid is wood bleach though. Oxalic acid is commonly sold as “wood bleach” and can be found in hardware and paint stores. Add to Cart. Application Use on all unfinished woodwork, floors, doors, etc. The bleach lightens wood and is excellent for removing black water spots and tannin stains in wood. Features: Concentrated formula – makes 5 litres. In fact, even Certified Naturally Grown beekeeping allows the use of oxalic acid for the treatment of Varroa. Wipe it clean and dry before you apply oxalic acid. When using Oxalic Acid from The Real Milk Paint Co., mixing is simple. Effective, strong and fast acting. Bleach Bare or Uncoated wood. Poison! 100% Oxalic Acid; Wood Brightener; MIXING INSTRUCTIONS: Mix 1 cup per gallon of water *** 1 8 lb pail of powdered oxalic acid Wood Brightener makes 16 gallons of Wood Brightnener. Wood can intentionally be stained black in the same way, and that's called… Test on a small, inconspicuous area of the wood to ensure proper wood care. Oxalic acid. In the rhubarb, it’s so much that the leaves are poisonous. Oxalic acid also Works for removing black water spots and tannin stains. Oxalic acid is a naturally occurring compound found in plants such as spinach. Wood bleach is excellent for removing black water spots and tannin stains in wood. Apply Wood Bleach Mixture. The oxalic bleach I buy has instructions on the label. 2. Regards, Ted Mooney, P.E. Even out the appearance of bare wood so it will stain to a uniform color. Not keen to have to sand maybe 2 -3 mm off the whole surface, I went off to Google for help; I found oxalic acid as a solution, and then found this product on Amazon. 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. See how you can get free standard shipping. Wood Bleach Description Savogran Wood Bleach contains oxalic acid which when mixed wi h hot water effectively bleaches unfinished or stripped wood quickly and easily. If you start searching the internet for oxalic acid application in bees, there’s a whole host of information out there on recipes for taking 100% oxalic acid down (wood bleach) to the 2 or 3% recommended application concentrations. Timber bleaching. ADDITIONAL INSTRUCTIONS: Always wet plants, shrubs, and other vegetation before and after use. 6153-56-6. When these types of wood get wet, grey spots can form and discolor the wood. Woods such as mahogany, cherry and oak have a an extremely high amount of tannic acid. finishing.com - Pine Beach, New Jersey It can be used on spots on furniture, like dark water marks, and it can be used to remove stains from larger areas of wood like floors and decks. Oxalic Acid Wood Bleach It truly is a great way to improve our merchandise and repair. Since oxalic acid is found in nature, and because it is a normal component of honey, oxalic acid is considered a “natural” treatment. Please note that any surface coating such as a woodstain, paint, oil etc will prevent the oxalic acid solution from working, so all protective coatings will have to be removed prior to application. When to Remove Water Stains From Wood Water-stained wood outdoors is best cleaned in the driest part of the year.