Dry Powdered Tannin Tannic Acid Product Information Bulletin Tannic acid, a commercial form of tannin is not a true acid but an acid-like substance called a polyphenol. Tannin occurs naturally in tea, coffee, oak, sumac bark and myrobalan. Tannic acid is a basic component in the chemical staining of wood. Tannin is already present in woods like Cherry, Oak, Walnut, and Mahogany. Tannin solutions can be applied to woods low in tannin content so stain chemicals that require tannin to react will produce the desired effect. Tannin, other uses: Tannin is used in the tanning of leather and tannic acid is the most common mordant for cellulose fibers such as cotton. Tannin is often combined with alum and/or iron. The tannin mordant should be done first as metal mordants combine well with the fiber-tannin complex. Directions: To make a solution to treat woods lacking tannin content: 1. -- Mix (in Plastic or Glass container) • five (5) parts, tannin powder into 95 parts of warm water • or, (3 Teaspoons into 8 ounces of warm water). Tannin may also be dissolved in denatured alcohol or acetone. 2. -- Apply the tannin solution to the wood by brush sponge or rag. Wear Eye, Skin & Respiratory Protection. Use with Plenty of Ventilation. 3. -- Allow the treated work to dry completely before applying Potassium Dichromate or any other chemicals. Notes: Always make a test to evaluate the process and liquid concentrations on the particular wood in use. Best results will be obtained on new or previously unfinished (grease & oil free) wood. Potassium Dichromate and Ammonia react with tannin to yield rich wood tones. "Rust Water" (steel wool soaked in vinegar) applied to a tannin treated wood will yield rich Black tones.   WARNING KEEP AWAY FROM CHILDREN Tannic acid is toxic when eaten or inhaled. Wear Eye, Skin & Respiratory Protection Wash Hands Thoroughly After Use DO NOT INHALE USE WITH PLENTY of VENTILATION Back To: Tannin Price List Available from: Shellac.net Wood Finish Supply