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Everything posted by fiddlecollector

  1. Potassium Permanganate is pretty benign in terms of dangerous chemicals, more chance of causing a fire or explosion than actually damaging your health. Its widely used for allsorts of things including a disinfectant for skin infections etc... These msds safety data have similar warnings for common table salt. Potassium dichromate is a different matter ,also used as a stain but highly toxic .Only recommended for use by people who know how to safely handle chemicals . By the way your title "hazard warning--Potassium " is misleading . Potassium is actually by itself an alkaline metal which reacts violently with water .
  2. I suspect the instrument is a violin from Yitamusic (the seller has bought several from them and the photo style /background is the same)
  3. Looks like one of those type from the Morizot??( i think they are from Morizot workshops ,never certain with these types of bows) workshop which have a faux mother of pearl slide made from some sort of plastic material. May be wrong though as cant seemuch of the slide in that one photo at a bad angle.
  4. It does happen occasionally though, and is often very confusing when it does. The bow just posted looks like abeille wood or maybe just the photos.
  5. The button silver appears to have been added later , you dont usually put what looks like pre made octagonal tube onto a round ebony core. The outer ring of the eye on the frog is not concentric with the inner circle and visa versa.
  6. Could also be BAUSCH . The stick looks like abeille wood.
  7. Sorry i thought the subject was refering to the usual head spline repairs. I cant comment on a bow ive never seen .
  8. Bowmakers would generally splice the wood at the handle if the blank was not long enough ,not at the head.
  9. I also have to gild this pretty large frame when ive restored the painting. The frame is around 1.3metres high .
  10. One tip use transfer leaf and not loose leaf, it absolute pain to handle unless you have a lot of experience. I was only yesterday using 24ct looseleaf to re gild a regency longcase painted dial face . Heres a frame i made out of scrap wood and left over wood decking for a Beatrice Cenci painting. I used the sgraffito technique . i used both red and black bole. I have many interests.
  11. I was looking at the slight rounding over on both inside corners whereas currently the outer corners of the ferrule are sharp. i suspect its been like that for a long while as well . A photo of the flat side of the ferrule would be helpful.
  12. The oneon mine was nickel though the bow was silver mounted. It was common to use nickel for the pearl slide backing as its stiffer and also not really visible apart from the two thin edges ,where the green colouring of copper oxide is.
  13. I dont know if its just the photos but i think he has the ferrule on back to front / wrong way around.
  14. Klaus Grunke told me that this method of small heelplate and pearl slide all encased in metal on German/ Markneukirchen bows is from the mid 20th century but didnt point to any particular makers.. The frog mortice look in about the right place compared to this photo but has been enlarged and messed with.
  15. Hope Dwight doesnt mind me answering but camel thorn can have lucchi reading very high up to 7000. But its generally not very attractive to look at.
  16. The original poster went wrong by adding soda ash , it is not required for the recipe in the Bersch book. (You dont add soda ash or potassium carbonate.) Also making the pigment carmine is slightly different than the usual lake process. Its made under acidic conditions if you want red coloured pigment. Ive done the Bersch book method years ago with some success, potassium oxalate is better than the cream of tartar and if i recall the cochineal was extracted with water and potassium nitrate or very dilute sulphuric acid. Every thing must be done with non iron/ steel utensils It is also a lengthy process if you follow the Bersch book method.
  17. The brasilwood term when applied to cheap bows founds in most music shops in North America or Europe usually means abeille or massuranduba wood (or other wood).
  18. Both bows you link to are made of abeille wood also called massuranduba, that species is more at risk from flooring manufacturers than bow makers.
  19. Simon workshop/ school probably
  20. Caribbean pernambuco is probably the same as Mexican pernambuco or Chakte Viga,same family as true pernambuco but has slightly different properties and from what ive heard doesnt make great bows.
  21. i found it was not very suitable ,too weak and floppy at normal bow dimensions but these wood vary tree to tree so someone else may have better look.
  22. People are getting increasingly sensitive to comments these days I know these Enrico Rocca instruments sell for alot these days but personally i wouldnt pay anywhere like these prices for any modern Italian violins even if i had the money to squander , the world has gone silly! The instruments may be a good investment but only as long as there is a market out there full of people who havent wisened up yet. I dont care who agrees or disagrees with me on the subject. But just a personal opinion.
  23. I wouldn`t call what your describing as a lift. Lifts are usually small end grain run out areas. Sounds alot like a natural split along the grain that pernambuco is especially prone to and often very hard to detect even during making but usually show up when heating the stick to camber . They can then often disappear when the wood has cooled down. So it might have always been there.. Hard to say much else without photos.
  24. looks like the underslide of the frog is sticking out further than the sides of the stick so id say no about the frog .(it can stick out if the frog is damaged but yours doesnt look damaged)
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