Dry Powdered Tannin
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.
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.
Always make a test
to evaluate your 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 tannin treated woods will yield
rich Deep Brown to Black tones.
Tannin, other uses:
Tannin is used in the tanning of leather and tannic acid is the most common mordant
for cellulose fiberssuch 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.
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