QUEBRACHO Powdered TANNIN
(74% -77 %) Tannin Content
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 can be utilized as a basic component in the chemical staining of wood.
Woods like Cherry, Oak, Walnut, and Mahogany are naturally rich in tannin.
Tannic acid solutions can be applied to woods low in tannin content so stain chemicals
(such as Potassium Dichromate) will react to produce the desired effect.
Note: Allow woods treated with tannin to sit overnight
Tannin, other uses:
Tannin is used in the tanning of leather and tannic acid is the most common mordant for
cellulose fibers such as paper and 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.
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/hot water
• or, (3 Teaspoons into 8 ounces of warm/hot 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 (usually overnight or 8 hours)
before applying Potassium Dichromate or any other chemicals.
• 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 or old rusty nails soaked in vinegar) applied to a tannin treated wood
will yield rich Black tones.
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