At times a pianos hammers may need treatment to increase the tone created by the hammer. This is especially true in the high treble end of the piano. Using a solution of acrylic granules and acetone is one way of achieving this. This bag includes 8 oz of pellets. To make a standard strength 8 oz bottle of hammer hardener solution just add 2 teaspoons of the pellets to 8 oz of acetone. Put the cap on the bottle and allow several hours for the pellets to dissolve. Shake well several times during the dissolving process. Please observe all warnings from the acetone manufacturer.
To increase the tone of the hammer apply the solution to the hammer shoulders or strike point. Allow the solution to dry. If the hammers become over-hardened, they may be needled until the desired tone is achieved.