Looking for participants for a verdigris experiment. If you have action parts that are contaminated and wish to participate here are the procedures. I'm interested to see if this procedure is effective and long lasting. Use Steinway discarded hammer flanges that are affected by verdigris.
1. Get six shank and hammer flange assemblies, the nastier the verdigris the better. Label them A, B, C, D, E and F. Measure the strike weight and modify so that each assembly is equal (somewhere around 9-10 grams SW preferred).
2. Measure the resistance of the flanges with a gram gauge and record the data. Also swing each assembly and record the number of swings (if any). Hold the hammer at 3:00 and if it swings to 9:00 that's one swing. Back to 3:00 is two swings. Each swing counts until the hammer stops moving.
3. Soak the hammer flanges in a narrow necked jar filled to cover the flange with Goof-Off. You might want to put some foil over the mouth of the jar to slow evaporation and check to be sure the flange remains covered for the required time.
4. Soak A, B and C for 24 hours and D, E and F for 48 hours.
5. Once the flanges are dry, test again with a gram gauge and swing test and record the data.
6. Put them in a paper bag and store somewhere for 6 months and measure again.
Email me the initial data (after soaking) and, if you can remember, send me the data after 6 months.
davidlovepianos@comcast.netNote: Goof-Off is toxic so take necessary precautions.
Thanks.
Your data chart should look like this
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SW |
Before soaking (g) |
Swings |
After soaking (g) |
Swings |
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After 6 months (g) |
Swings |
A (24) |
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B (24) |
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C (24) |
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D (48) |
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E (48) |
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F (48) |
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David Love RPT
www.davidlovepianos.comdavidlovepianos@comcast.net415 407 8320
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