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  1. R

    Greetings from Croatia

    I was in a comparable situation in Germany, I just waited patiently for the right pieces to appear on ebay. It took literally years. And yes, one gets sidetracked by building equipment like sharpening templates, supports for different sharpening stones, a power hone, a first turntable, another...
  2. R

    Charge time for Jun-air compressor? (6 mins)

    At the „12-XX“ units, 12 stands for two compressor heads, the 3 non-return valves are critical. One of the three could fail, whithout you noticing it immidiately. Just the pumping capacity decreases. They are easy to take apart and clean, buy the replacement gaskets and O-rings before trying to...
  3. R

    Charge time for Jun-air compressor? (6 mins)

    Hmm, attaching the manual did not work, it is too large. Here‘s the link instead: blob:https://usermanual.wiki/b2e17bc9-8ecb-430d-a8d2-5fca1c666a5c
  4. R

    Charge time for Jun-air compressor? (6 mins)

    The Manual states close to 6 min for a 50Hz and close to 5 min for a 60Hz model. I‘ll attach the manual. Cheers, Ralf
  5. R

    Background dots

    I could just speak for beading tools, which I use for stone setting in gold an silvber. Mine (from Busch, a german brand) have got almost knive-sharp edges around the “bowl”. When using this type in steel, you probably have round off this edge first, else it might break. One could also get a...
  6. R

    Graver blank Help!

    I‘ve got the same handpiece, by the look of it. The clamping mechanism of mine works only for a small range of tool sizes. Check with drill shafts of different sizes, for example. I work with round 2mm HSS and carbide blanks, I‘ve made a spacer to get them clamped properly. The GRS QC holders...
  7. R

    Comfortable House Barcelona

    Hi, is this one of Antonio Gaudi‘s haouses? Cheers Ralf
  8. R

    18KY gold when filed becomes red

    Most 18K yellow golds contain 10-15% copper. When you anneal those, copper oxide forms at the surface. Usually one pickles the annealed gold in an acid solution, which removes the copper oxide and leaves a copper depleted layer with a pale yellow or even greenish tint. Emery paper cuts throug...
  9. R

    Font Question

    Troubadour Pro Engraved is not a 100% match, but comes pretty close. May be used for design, if you cut the the long tails off at some characters. Found it with „what the font“ on an iPad. Cheers Ralf
  10. R

    Depression/ cracks in ingot

    I cast small amounts of gold for rolling in a piece of wood, where I have cut a depression in before. Due to it‘s high surface tension, gold will form a rounded top and ends anyway. The wooden mold is reusable a couple of times, getting a bit larger each time. No preheating required, free...
  11. R

    Help, please: Transfer wax alternative

    The procuring problem may not be limited to Italy, I‘ve just scanned some GRS carrying shops in Germany, they either don‘t list it anymore or denote it as „no longer available“. If you could still buy it in the Netherlands, replenish your stock…. Cheers Ralf
  12. R

    Engraving finishes

    Roger, thanks for the praise for France. I came there 24 years ago for a job, and stayed. Meanwhile I work again in Germany, still live in France, and try to combine the best of both countries. The Alsace is a very beautiful region, so are many other regoins of France. I like the South a bit...
  13. R

    Engraving finishes

    I will ask the company about heat and thermal shock resistance. The german depandance proposes the coating of motorcycle manifolds. Perhaps it lasts… Cheers Ralf
  14. R

    Engraving finishes

    Thanks for the information about Cerakote. I didn’t know it, I‘ll try to have my motorbike‘s exhaust manifold coated. Cheers Ralf
  15. R

    Work hardening hollow domes

    You could precitipation harden gold as well, but to what extent and how exactly to do it depends on the precise alloy. The supplier of the sheet metal should be able to tell you. I‘m just familiar with some german alloys, it will not work the same way for alloys from other foundries. The general...
  16. R

    Work hardening hollow domes

    When working with silver, try Argentium for your domes. Two advantages: -it does NOT firestain, comes out of the pickle with a white matte finish after soldering -your finished piece can be tempered at 300-350 °C 1 hour for hardening without altering the surface (much), it may darken a little...
  17. R

    Scrolls Can Be Found Anywhere

    looks like a tatoo masterpiece, and given the surface, it‘s „stippeled“ onto a tough lady who does not fear pain
  18. R

    Digital Microscopes

    Tried one about 6 years ago, was hugely disappointed by the magnification / working distance dependance, the amout of light it captured and the noise in the image. It was no cheapo, about 200-300 Euros, from a colleague who had tried it out for parts inspection. I’m toying with a similiar idea...
  19. R

    Nikon microscope ques

    One more point: This microscope is old. Over the years, some scopes develope a problem called “fungus”, something to do with a biological process attacking the glue that holds the achromatic lenses together (pairs made of glasses with different refraction indexes to minimize chromatic...
  20. R

    Animal Wood Carving

    Yes, very beautiful indeed… Strange conincidence: doesn‘t „Mori“ mean „forest“ in Japanese? Wikipedia confirms my hunch, but also says „Mori“ is a pretty common surname in Japan. So, perhaps not too much of an coincidence after all. Cheers Ralf

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