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Everything posted by uguntde

  1. uguntde

    Interesting 18th century English violin

    Maybe a fake neck graft. Someone tried to work on the scroll and peg box, unfortunately.
  2. uguntde

    Interesting 18th century English violin

    The neck is nailed, yes. And the ribs that are one piece from C-bouts corner to C-bouts corner. Very nice work. The finger board was previously raised, and is now being replaced after a neck graft.
  3. uguntde

    European Sycamore vs American Maple

    Sychamore is just the English common name for maple. I have seen sychamore trees next to each other in England, one showing ripples, the next one not. This makes me think it is not a genetic feature. There is plenty of nice sychamore in England now. I see lots every time I walk through Green Park in London, all nicely figured as you can see from the ripples in the bark. The park web site however claims they are Acer saccharinum and they are not up for grabs.
  4. uguntde

    The Value of a Violin as Art versus as a Tool

    I remember a Guarneri with a Hamma certificate that didn't pass dendrochronology, and some instruments by the Foller brothers that were long believed to be genuine.
  5. An €800million concert hall will certainly be a driver for culture in Germany and beyond - well exemplified by the opening concert which included an Uraufführung by a piece by Wolfgang Rihm. Their first concert season is already sold out. Simon Rattle is trying to convince Britain to invest on a similar level in London, interesting to read the Guardian article with respect to this .
  6. uguntde

    Collin-Mezin cello?

    The signature is not bad, although not perfect. This is what it is to be. I have two 1888 at the moment. No cello though.
  7. uguntde

    Collin-Mezin cello?

    The maker is an excellent copyist, you need to give him credit fir this. Whoever gets this cello for below £2000 got an amazing deal if it sounds. If I was a maker, I would copy those, the Hels and the like, and not the Strads. I would certainly not put in new Chinese pegs to spoil it all in the end. It almost seems intentional.
  8. uguntde

    Collin-Mezin cello?

    So far it is around $1600, and is is very close to the real thing. For me the only argument against it being a Collin Mezin are the wood of the back and the varnish on the side.
  9. uguntde

    BROMPTONS - Seller beware!

    I don't know what your instruments were. However, there were many instruments that were not set up for playing, and set the case some were yours, it is generally a good idea to ensure they are strung up with a half way decent bridge and the sound post set. If they are not in playing condition you loose half the market, that is enthusiastic players and those few dealers who can actually play and make a judgement on sound. In this respect Bongartz always did a better job in fitting instruments up - making the 20% charge somewhat more reasonable (if he doesn't charge extra for this service). One could well argue that the auction houses could do a much better job than showing the same stuff from auction to auction, by commissioning a violin maker to set up instruments, by working on better options to return instruments, by providing essential information upfront. Nobody prevents anyone from starting yet another violin trading organisation. I often thought whether this would work, especially as the 20% charge seems quite high. Once you have the amount of staff that Brompton and Tarisio have and you pay your rents, insurance fees etc you will probably end up with similar figures if you want to make a profit.
  10. uguntde

    BROMPTONS - Seller beware!

    I had a similar issue with Tarisio. I had a bow in a UK auction, and they took it to New York after it didn't sell in the UK. They told me very late that shipping back would incur import duties. Luckily it sold. Knowing this I am careful with selling abroad. On the other hand, the last Brompton auction was well visited from dealers and collectors from Europe and Asia hoping for a deal, considering the low Pound. I would assume this trend continues for a while. I would just try the next Brompton auction. If your instruments were of good quality, there may be a way to sell otherwise in Europe (Germany is a good market). I would be happy to help if I can. Whether ebay is a good option, I am not sure. You may sell the odd violin over price there, but I would trust Peter Horner more than ebay customers.
  11. uguntde

    Top 10 Living Soloists - your vote

    I also like: Vadim Gluzman Kristof Barati Patricia Kopatchinskaja
  12. uguntde

    Are carbon fiber Bows acoustically "alive"?

    I have tested Coda and a range of Chinese carbon bows. Some made a very nice sound, all of them were stiffer than any good wooden bow. I also found that there is a wide range of quality in Chinese carbon bows, you find some of great and some of mediocre sound quality. The same can be said about their technical performance. I personally also find that a good carbon bow resonates well, although I clearly find good wooden bows to be superior when it comes to feel the resonance in the bow.
  13. uguntde

    Violin ID

    I saw this violin today. It is roughly made, but has corner blocks, although linings not going into the corner block. See the long edges, and wide purfling. The scroll is beech wood. See the peculiar shape of the f-holes. I think it must be a late 18th centrury English violin.
  14. uguntde

    Spirit Varnish recipe recommendations

    Bisiach's is not correct. I have seen it in Italian, somewhere in Italy. He has lots of Gutto = Gamboge in it. That's where he has his yellowish colour from. He also uses less venetian turpentine, which would give a lot of craquel. I like these nicer spirit varnishes a lot better than oils - slightly against today's fashion in violin making.
  15. uguntde

    Using acetone to remove varnish

    If you don't want to use something like Nitromors you can use methylenechloride, or trichloroethylene (used a lot in metal industries). Don't use chloroform, it is a carcinogen. For a spirit varnish all you need is spirit, or isopropyl alcohol.
  16. uguntde

    Sodium Nitirite Questions for tanning maple

    Maybe I can help clean this up from a chemist's point of view. Nitrate (NaNO3) is an oxidizing agent, in the course of oxidizing another substance it turns in to nitrite. Nitrite (NaNO2) is mild a reduction agent, often used as a preservative, as it prevents oxidization. Nitrite on wood won't do much. Nitrate on wood will oxidize compounds in the wood. I assume the colour change arises from the xanthoproteic reaction which can occur with certain phenols, and also with some amino acids in proteins, including tyrosine or tryptophan. The reaction product is often yellow to orange. Wood tends to turn into a slight pink colour. It is the same reaction that turns your hands yellow when you get in touch with nitric acid (HNO3). Nitrate does probably not the same on your wood as air and UV light do. I conclude this from the different color change, which is more into yellow for UV light, and aslight pink for nitrates. You won't buy huge amounts of nitrate without special permission as it can also be used to produce dynamite and other explosives.
  17. uguntde

    Rontgen Viola Sonata parts?

    You find it here:
  18. uguntde

    Need help identifying a very old special violin

    Some of the cracks in the back almost look as if they had been in the original wood. I don't think they can be repaired to the level ehere they become largely invisible, you need clean cracks to get a perfect repair. These are old, there is dirt on the surfaces and prbably wood missing. However, it is worthwhile to take it to a good repairer to ensure it is stable, this way it remains a great violin to play. I have seen a Hungarian similar tho this one, also with Guarneri style f-holes, but also not attributalble to a specific maker. As the varnish is largely not original it will be hard to judge anything on this.
  19. uguntde

    Anyone with experience with Coda Bows

    When the Stringzone had a sale I tried the Coda Diamond GX and DX. The DX was disappointing, the GX was good. I compared it with a collection of Chinese carbon bows which I had bought over the years and one of the Chinese was superior (especially for fast bouncing strokes). It may be a matter of taste between the GX and a good Chinese, the price ratio is almost 10:1. And some Chinese makers have very nice frogs now. In the end I decided against the Coda. After all I also prefer a good wooden bow. All carbon bows I have seen are somewhat too hard although some have an excellent sound.
  20. uguntde

    Yita vs. Gliga? + new price/skill level standards?

    I recently bought several. One of their top model violins that I had on loan for a while. It is certainly ok but nothing special. Considering the low price this was certainly good value. The viola came with their new oil varnish which is red and shiny. I reworked this, and it looks ok now. The sound was nice, but not comparable to a modern master viola from a good European maker. But I have also seen new violas for €10000+ that are not better in sound. I also bought one of their toppest level viola bows, for about €250. This is a very good bow, comparable to what you can buy in Europe. Not a Guilaume, but still very good.
  21. uguntde

    Viola Review Topic

    They are getting very good. As a violin maker I would be worried. Their marketing is weird, very Chinese. But they know how to make bows and violins and they are constantly improving.
  22. uguntde

    Viola Review Topic

    I have bought from them as well. They are very good and getting better. I had a violin and lots of bows from them.
  23. uguntde

    Engelman spruce

    Whatever that means. For equal elasticity lower density means lower speed of sound within the material. On the other hand I would expect that a lighter material gives rise to higher frequencies, and a spectrum with stronger high frequncy overtones is what is perceived as a singing, radient or carrying tone.
  24. uguntde


    Needs to look like those: Very different.
  25. uguntde

    Engelman spruce

    2 years ago I remember some articles about fungi wood treatment. The whole idea was to reduce weight while keeping elasticity. The fungi eat away the heavy lignin. Why would one do this if light weight / low density was not an advantage? One of the articles about this here: Schwarze and Schleske even patented this: