Wood Finish Supply &
Home of:
Authorized Mohawk Distributor

Select Products for Traditional Furniture Finishing, Touch-Up, Repair and Maintenance

Our showroom is now open, Napa County COVID-19 Requirements -
Please Wear a Face Covering & Maintain 6 ft. of Physical Distance

New Location - 2465 Second Street, Napa Ca 94559
For information Phone: 877-245-5611 Monday - Friday - (Saturday by Appointment)
Your On-line Order will be shipped promptly via US Mail or UPS
Thank You for your support, we appreciate your business.
Ron, Pete & Shannon


(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.

Tannic acid is toxic when eaten or inhaled.
Wear Eye, Skin & Respiratory Protection
Wash Hands Thoroughly After Use

Please enter quantities of desired items below then click

• QT1  -  QUEBRACHO Powdered TANNIN - 1 Lb  -  $29.95  -  Quantity   
• QT8  -  QUEBRACHO Powdered TANNIN - 1/2 Lb  -  $17.00  -  Quantity   

Please enter quantities of desired items above then click