Tannic acid is used in conjunction with ferric or iron nitrate (also available from Kibler's Longrifles) in the staining process to accentuate maple figure. A solution of tannic acid (1 Tbs dissolved in 1 pint of water) is prepared and applied to the bare stock. After this dries, the iron nitrate is applied. A reaction between the iron nitrate and tannic acid occurs forming an iron tannate compound which is very dark in color. Once it air dries, the surface should be heated with a heat gun. After this step, the entire stock is quite dark.
Next comes abrading the stock to work the stain off the long grain wood to bring out the figure. This process relies in the varying grain direction of figured wood. The stain can be fairly easily removed from the long grain regions, but is quite permanent in the end grain areas since the stain is absorbed pretty deeply.
A combination of fine sand paper and woven abrasive Scotch-Brite pads work well. It is also helpful to use oil or finish during this process, to keep the abrasives from becoming plugged and to evaluate the progress.
After the stock was worked back sufficiently, apply finish.
The photos shown are real results attained following these instructions. This shows burl maple, but this method will also work well on other highly figured maple.
Good product
Tannic Acid Powder
I have not had a chance to use this product. - Mike
Always a great experience dealing with Jim and his team. Can’t wait to see how my stock turns out.
Sorry guys, I haven't gotten a chance to use it yet.
I bought my kit in 2017. My plan was to use the company shop after hours. Somebody complained. So I boxed up my kit. I retired 4 years later and this last winter I got the kit out and finished it. It was a good learning experience. Thinking of building another one. It shoots great.
Used this on a curly maple stock on my Bedford County flintlock. It turned out beautiful, and very much exceeded my expectations. Thank you for sending this in a timely manner.