Wood Finish Supply &
Home of:
Authorized Mohawk Distributor

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

Our showroom is now open - New Location - 2465 Second Street, Napa Ca 94559
For information Phone: 877-245-5611 Monday - Friday 9-4 - (Saturday by Appointment)
Napa County COVID-19 - 6/15/21 Guidelines - If NOT Vaccinated Please Wear a Face Covering

On-line Orders will be shipped promptly via US Mail or UPS
Thank You for your support, we appreciate your business.
Ron, Pete & Shannon


 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.

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.


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

• TA1  -  DRY POWDERED TANNIN (Tannic Acid) - 1 Lb  -  $19.80  -  Quantity   
• TA8  -  DRY POWDERED TANNIN (Tannic Acid) - 1/2 Lb  -  $10.85  -  Quantity   

Please enter quantities of desired items above then click