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Peter K-G

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About Peter K-G

  • Birthday 06/13/1971

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    Violin Making
    Violin Sound

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  1. For the record, I made a couple of violins with "heavy" tops, they still are the prefered, like the best ones... Well to fiddlers, perhaps? We did a test with my son, because he was giving me lot of critisism. Why did you make the new ones and spent 15 years of research. The old sounds better?? I had him to download dB software on his phone and the new ones had about 10-15 more dB!
  2. Don, What do you think a .45 density top, today, would have started out to be 300 years ago? Or another way of putting it, how much does spruce loose density over a long period of time. Thin plates like a top?
  3. Take one of the heaviest and put the varnish back on and add 300+ years of hemicellulose loss and you might be just under 80g.
  4. I just had to try... Google transate is great!
  5. To OP poster. You make it look easy (and it isn't always for such a fiddle) My harsh suggestion, do you have a fire place? They do burn like he.... No offence, there are trillions of them.
  6. To lime or not to lime (calcium hydroxide), has been discussed a lot and there is no right or wrong. I use to but I don't anymore. My conclution is that you have to know your colophony, by trial and error. No one here can tell you what to do, unless they have tested the same colophony you use. Even that is not sufficient, because everyone has their own process and preferences for the result
  7. Jim, I think it's confusing to say: "You need approximately twice the cooked colophony as you have in the varnish". I weigh the colophony before I start cooking it and then weigh it all the time during cooking until I have the desired weight. As in OP recipe Colophony 140g -> 75g
  8. These two pieces are examples of what I described Batch 2022 #1 and Batch 2020 #1
  9. When you put dark varnish on unsealed wood i.e without any ground, the wood absorbs a lot of varnish and it gets dark. I do this on plain white wood, that has not been tanned, to observe the real darkness, color and transparency of the varnish. After that I test different groundings to get varities of final finish.
  10. It’s not all about the varnish, for quick demonstration: Same varnish, same piece of wood, that has been grounded (light ground) and sealed One thin layer of varnish
  11. It's dark red/brown varnish on bare white wood with no ground. Colophony reduced 50% by weight. The maple flames are for sure "burnt", the varnish is transparent deep down in the wood.
  12. I too use quite heavy cooked varnish
  13. For example, light varnish I have cooked. The same colophony: Colophony start weight 80 g => reduced to 75 g Linseed oil 75 g No turpentine needed at cooking stage
  14. What you are doing when cooking and reducing colophony a lot, is taking away volatiles/turps. If you use a light cooked colophony the turp is already in the cook.
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