Michael.N.

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About Michael.N.

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  1. miniature milling machine

    Forget the milling machine. Use the scraper or a rough abrasive wrapped around a small wooden block. I've done many planes and not had much luck with rubbing the sole on abrasive stuck to thick plate glass. That's when I turned to using abrasive on a wooden block. I deliberately relieved the areas just in front of and behind the blade - same manner that Japanese wooden planes are relieved.
  2. Does a violin improve with age?

    You know I've done many side by side comparisons with guitars. I worry if there's a gap of a few seconds (between playing each guitar). I'd be a quivering wreck if that gap was being measured in years! You are relying on an impression. Maybe it's you yourself that's changed? (much more likely), perhaps your playing is a little different?
  3. Renaissance Workshop Company....Plans and Drawings

    RWC started off as an off shoot of the Early Music shop. It was sold off many years ago and is now run and operates in Spain. They were very much a kit based enterprise specialising in early instrument kits. I haven't seen their viol plan but I have seen the plan for a lute (when they were based in the UK). I wouldn't be paying those kind of prices for their lute plan. If you think you are going to get something rather special then feel free! The plans don't make the instrument for you, you just need enough detail and the know how. No plan is ever going to give you the latter.
  4. Renaissance Workshop Company....Plans and Drawings

    http://www.luth.org/plans/instrument_plans.html Somewhat cheaper. RWC plans are ridiculously expensive and always have been. http://homepages.ed.ac.uk/am/iwd.html#Viols Plans in the collection of museum around the world.
  5. French Polish materials

    I was taught French polishing some 40 years ago. I think I've pretty much tried all manner of combinations throughout the years, different cloth types, oils, shellac type and various alcohols. I've been using isopropyl for a good few years now, not really noticed any difference between that and industrial ethanol. They flash off at different rates but the difference isn't worth worrying about. Cloth; cotton or linen both work. Waxy shellac is slightly softer but usually has more colour. Depends if you want more of a clear finish. I use mineral oil but I've also used linseed, olive and walnut. They all work.
  6. Everclear alcohol

    I've been using the high % isopropyl alcohol for several years, buying it in 5 litres. It's water clear, supposedly flashes off slightly slower than ethanol. In use I can't notice the difference whether brushing or french polishing. Don't know what the health problems are, wear a glove when French polishing, use a well ventillated area.
  7. Shellac

    I haven't found glair to be any better than shellac, at least not in an optical sense. Try them both side by side on an off cut.
  8. Polyurethane

    You could try Tru oil, which I think is a type of linseed/alkyd varnish. It's a thin wipe on finish but it can be brushed on (very easy to brush). It dries relatively fast, probably because of the added driers. On a test piece I brushed on 8 or 9 coats in one long day (one single UV light in the cabinet) and rubbed it all out to flat gloss the very next day! I mean guitar flat gloss too. The woodwork was taken to a very high grit which obviously helped to achieve a finish in such a short time. Of course there's no need to rush. I was just finding out if it could be done. No colour though (or very little). It's also readily available.
  9. Colophony shelf life

    I don't know what grade the Kremer stuff is. I don't think it is stated. I have bought some WW grade from another supplier but I've none of the kremer stuff left, so I can't directly compare. It probably doesn't matter, a varnish of some sorts will result. Next batch will be the Roger H. rosin straight into oil, the one he calls 'boring'. I don't need colour ( for a guitar) but I do need reasonably hard, so 60% 40% resin oil ratio might do it. The last one I did was cooked at 200 C or under. It has some colour and rather nice it is too, if you like yellow/amber.
  10. Colophony shelf life

    Over cooking/temperature too high can certainly produce a greenish colour. I've done it, yucky green brown. I still have the varnish. The only good thing is that it dries very fast. That's not much use when you can't use the stuff though.
  11. Colophony shelf life

    Yes. It's the stuff in a jar. Try putting that number in Kremers search box.
  12. Colophony shelf life

    60305 is the stuff that I used. Kremer even state that it is suitable for violins. In the past I've used powdered rosin (not Kremer) and that was obviously light in colour too.
  13. Glair and Oil Varnish

    I've tried the egg white on many spruce off cuts. Being lazy I left the remainder of the glare sitting in the cup for a few weeks. Apart from it crazing (not a concern when used as it normally is) it feels like a pretty hard resinous like substance, perhaps not that different from a shellac flake. I also tried to put multiple coats of egg white on. It's water soluble so the 'finish' probably never became that thick. Perhaps not surprisingly the optics weren't great, a bit murky looking. I suppose if you use it just as a sealer it will be OK. I think I prefer shellac though.
  14. Varnish, quick and dirty.

    100 hours is a quite a lengthy cooking time. I'll have to use a sand bath to save on the bills!
  15. Varnish, quick and dirty.

    Well I suppose I could always put it back in the pan, cook longer or take the heat towards 200 C. It's all good experience. I don't know if it's too late to add the lime but I can try that too.