joerobson

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About joerobson

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  • Birthday 06/18/1950

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    http://www.violinvarnish.com
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    Trumansburg, NY

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  1. Do they think they can do accurate testing.
  2. I know a violin maker whose partner is a world class sound engineer...I'll ask them. Joe
  3. I have 7 different light sources around my bench.....never enough
  4. You could contact Joshua Beyer....he has made several.
  5. On this I think we have to agree to disagree.
  6. Michael, This is not clean room contamination. The instrument itself displays amino acids as a result of handling . Again, this is not my opinion. It is the result of the evaluation by those familiar with the testing process. Joe
  7. There are many roads to roam.... My view of the surface protein does not come from my personal opinion. When these tests are done the lab techs put their hands in a vacuum chamber to snap on gloves. Any exposed skin in the test room will read out as amino acids. I am instructed that any object made by human hands will test positive for amino acids on the surface...anywhere it was touched, using this reliable test method. That having been said, I find your new approach to the surface of the instrument interesting and engaging. I look forward to seeing the results. As we have discussed many times ,the Stradivari instruments vary greatly. One can rely on the scientific observations. One can rely on the anecdotal information provided by someone we trust. One can rely on the historical records. But in fact the best thing to rely on is your own eyes. What do you see?!? Example: what does your ground look like next to a glue ghost? I recall going to the NMM in South Dakota and seeing the Stradivari guitar and violin next to each other. The contrast was striking...the guitar did not have a ground. It appeared to be varnish directly on wood, while the violin lit up like a 1950's Christmas tree. It is important to train your eye and memory to sort out observations without prejudice. It is very important to take any opportunity to see great instruments. These chances are more rare all the time. As I said, there are many roads to roam. The road to Cremona in the latter half of Stradivari's life time is narrow and rocky. But less overgrown now than in the past. On the subject of scientific evidence: I feel it necessary to maintain all my work within the brackets set forth by Brandmair and Echard. on we go, Joe
  8. These characteristics are not based on contamination.
  9. From her website: vitae Brigitte Brandmair is a self-employed, autonomous and internationally active certified conservator for musical instruments. She holds a degree of the Cologne University of Applied Sciences at the Cologne Institute of Conservation Sciences. She majored in the conservation, analysis and documentation of antique instruments, with the focus being on classical Italian stringed instruments. In addition to her scientific expertise, she also holds a master degree as a plucked instrument maker and an apprenticeship as a carpenter, which allows her a comprehensive approach in scientific musical instruments matters. She is currently involved in several international research projects. Besides Brigitte's activities as a conservator for musical instruments matters, she is giving lectures and publishing articles. Brigitte is one of the two editors and authors of the standards setting publication “Stradivari Varnish”.
  10. She holds a Master's Degree as a plucked instrument maker...and is also a carpenter.
  11. Yes. I find it significant and refreshing that Ms. Brandmair does not equivocate or speculate about the findings. She is a scientist foremost. Remember that she is also a certified luthier. on we go, Joe
  12. Yes. Ms. Brandmair holds to the findings without speculation. Taking the findings and testing methods to those familiar with the tests was revealing. The test is extremely sensitive. The protein on the surface could be egg from breakfast, glue smears, or most likely the evidence that the wood was handled by humans. Beyond that, the other characteristics of the Ground do not agree with a casein sealed surface. Protein grounds can be quite effective. It is just not as found on the classic Cremonese instruments that have been studied. on we go, Joe
  13. Brandmair was quite specific with me about the findings. Amino acids were identified on the surface.
  14. Where do you live?