Product Information Bulletin
Tannic Acid
Dry Powdered Tannin

TANNIC ACID
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 ingredient in the chemical staining of wood.
The tannic acid or tannin is already present in woods like oak, walnut, and mahogany.

Tannic acid can be applied to woods low in tannin so chemical stains that require tannin content will react.

TANNIN - Other Uses:
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 five (5) parts, tannic acid powder into 95 parts of warm water; or (3 Teaspoons intro 8 ounces of warm water).
May also be disolved in denatured alcohol or acetone.

2. -- Apply the tannic acid solution to the wood.
Wear Eye, Skin & Respiratory Protection.
Use With Plenty of Ventilation.

3. -- Allow the treated work to dry completely before applying any other chemicals.

Notes: Always make tests to evaluate your process on the particular wood in use.
Best results will be obtained on new or previously unfinished woods.

Potassium Dichromate and Ammonia react
with tannin to yield rich wood 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



Wood Finish Supplyy

www.woodfinishsupply.com