Potassium silicate 30%
Potassium Silicate – Wood Hardening and Impregnation in Violin Making
Potassium silicate is a traditional treatment used in violin making to harden and impregnate wood. It is primarily applied to the inside of the instrument, especially on high-quality, thinly carved tonewood tops and backs. This treatment increases structural strength without negatively affecting the acoustic properties of the wood.
Impregnating the wood with potassium silicate stabilizes the cell structure, improves resistance to moisture, mold, and aging, and prepares the surface for further steps such as grounding or varnishing. It is a well-established part of traditional wood preparation in the crafting and restoration of fine string instruments.
Preparing the Solution
Depending on the desired intensity, the solution can be mixed as follows:
- 5% solution (mild hardening): 50 ml potassium silicate + 300 ml water
Ideal for sensitive or very thin wood areas. - 10% solution (stronger effect): 50 ml potassium silicate + 125 ml water
For more robust parts or deeper penetration.
Application
The solution is applied evenly to the raw inner surface of finely sanded wood using a brush or sponge. Allow to dry completely (several hours, depending on ambient conditions). Any crystal residues can be gently removed with fine steel wool or a soft cloth.
Safety Note
Potassium silicate is strongly alkaline. Wear protective gloves during use and avoid contact with skin or eyes. Store the product sealed, cool, and frost-free.
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