Michael_Molnar Posted January 6, 2018 Report Share Posted January 6, 2018 On 12/19/2017 at 3:14 PM, Szymon said: Take it easy, Merry Christmas to you and all!!! I love the "star" at the tree top. Quote Link to comment Share on other sites More sharing options...
Peter K-G Posted January 10, 2018 Author Report Share Posted January 10, 2018 Quote Link to comment Share on other sites More sharing options...
Peter K-G Posted January 26, 2018 Author Report Share Posted January 26, 2018 About cooking varnish I have received some e-mails about my varnish cooking and haven't had time to answer. These links describes the cooking with an image album from last summer''s batch It starts with reducing Colophony, cooking it slowly (150 - 180 C) for 4,5 h to 10 h. Cooking varnish is SUPER SIMPLE, there is nothing strange about it and it involves no difficult tasks. The only part that should be carefully done is when adding turpentine at the last stage. Don't pour cold turpentine into hot varnish! Cool down the varnish to 100 - 120 C and warm up turpentine to simmer before slowly pouring it into the varnish (while stirring) http://www.thestradsound.com/varnish/varnish-recipe https://photos.app.goo.gl/eTnryGmEom3565kx1 Quote Link to comment Share on other sites More sharing options...
carl1961 Posted January 26, 2018 Report Share Posted January 26, 2018 Thanks Peter for posting again, Great work and very helpful safe cooking procedure, very detailed! Quote Link to comment Share on other sites More sharing options...
Szymon Posted February 1, 2018 Report Share Posted February 1, 2018 Peter, do you add siccatives to your oil varnish? If so, what amount? Quote Link to comment Share on other sites More sharing options...
Peter K-G Posted February 2, 2018 Author Report Share Posted February 2, 2018 17 hours ago, Szymon said: Peter, do you add siccatives to your oil varnish? If so, what amount? No I don't add siccatives. Boiling cold pressed linseed oil 4-5 hours at ~95 C, makes the varnish dry fast, but UV is needed. Quote Link to comment Share on other sites More sharing options...
Peter K-G Posted May 25, 2018 Author Report Share Posted May 25, 2018 Still no workshop time, but always time for observing. The four "Soil copies" are now back in summer mode. I like the winter mode too, bright and on the edge, but they are at their best in this condition. We have a Swedish term for how to describe a violin with this property/quality - Violinen har märg Quote Link to comment Share on other sites More sharing options...
Andreas Preuss Posted May 25, 2018 Report Share Posted May 25, 2018 On February 2, 30 Heisei at 7:50 PM, Peter K-G said: No I don't add siccatives. Boiling cold pressed linseed oil 4-5 hours at ~95 C, makes the varnish dry fast, but UV is needed. Your pot and equipment looks so clean! Quote Link to comment Share on other sites More sharing options...
Peter K-G Posted May 25, 2018 Author Report Share Posted May 25, 2018 It was brand new at the time the photo was taken. Nevertheless I do keep my varnish cooking quite clean. Later this summer it's time for more varnish cooking Quote Link to comment Share on other sites More sharing options...
Peter K-G Posted June 16, 2018 Author Report Share Posted June 16, 2018 http://www.thestradsound.com/ongoing/varnishcookingtime Started 13:00 today Quote Link to comment Share on other sites More sharing options...
Peter K-G Posted June 16, 2018 Author Report Share Posted June 16, 2018 Done 9.5 hours Quote Link to comment Share on other sites More sharing options...
uncle duke Posted June 17, 2018 Report Share Posted June 17, 2018 7 hours ago, Peter K-G said: That's pretty clean. Did you use lime this time? Quote Link to comment Share on other sites More sharing options...
Peter K-G Posted June 17, 2018 Author Report Share Posted June 17, 2018 I have stopped using lime in varnish cooking a couple of years ago. It makes it too hard with the colophony I use and it is more durable to moisture (sweat) without the lime. There has been a lot of discussions about this and my conclution is that some rosins need to be limed because of its acidity level. Quote Link to comment Share on other sites More sharing options...
Peter K-G Posted June 17, 2018 Author Report Share Posted June 17, 2018 Of course i couldn't wait to test it Three layers of varnish, no ground (backside of the piece for reference) Quote Link to comment Share on other sites More sharing options...
Nick Allen Posted June 17, 2018 Report Share Posted June 17, 2018 2 hours ago, Peter K-G said: Of course i couldn't wait to test it Three layers of varnish, no ground (backside of the piece for reference) Are those coats applied relatively thick or thin my friend? Thanks! Quote Link to comment Share on other sites More sharing options...
Peter K-G Posted June 17, 2018 Author Report Share Posted June 17, 2018 6 minutes ago, Nick Allen said: Are those coats applied relatively thick or thin my friend? Thanks! Three thin layers, deluted with ~40% turpentine Quote Link to comment Share on other sites More sharing options...
Szymon Posted June 17, 2018 Report Share Posted June 17, 2018 Hello Friends, I have not been to the forum for a long time. This is my yesterday's varnishing Quote Link to comment Share on other sites More sharing options...
Nick Allen Posted June 17, 2018 Report Share Posted June 17, 2018 2 minutes ago, Peter K-G said: Three thin layers, deluted with ~40% turpentine Wow. That's impressive color intensity for only three thin dilute layers. Quote Link to comment Share on other sites More sharing options...
J.DiLisio Posted June 18, 2018 Report Share Posted June 18, 2018 Very nice color! Can’t wait to see it on a fiddle. Quote Link to comment Share on other sites More sharing options...
FoxMitchell Posted June 18, 2018 Report Share Posted June 18, 2018 That is some good looking varnish there! Quote Link to comment Share on other sites More sharing options...
Peter K-G Posted June 18, 2018 Author Report Share Posted June 18, 2018 Thanks! I think it's a matter of what type of rosin you start with and how much it should be reduced by cooking it, to get really dark varnish. (ref. Hargrave cooking long and slow topics) It is also important to not burn it (red color is lost), so I constantly stir it during 9-10 hours, every 15-30 min or so. The temperature also needs to rise gradually to get the same viscosity. (melting point is rising when it is reduced) At the end of cooking I always wonder if I have overdone it, because it is pretty much black. I didn't take a photo of just colophony, this is a dip into the varnish when it is ready cooked together with linseed oil, mastic and turp: Quote Link to comment Share on other sites More sharing options...
Peter K-G Posted June 18, 2018 Author Report Share Posted June 18, 2018 11 hours ago, Szymon said: Hello Friends, I have not been to the forum for a long time. This is my yesterday's varnishing Nice! Thanks for sharing, I have yet to make some own pigments as you posted earlier in this thread. I'm going to strip varnish of an earlier violin I made and re-varnish it with this new batch. Quote Link to comment Share on other sites More sharing options...
Szymon Posted June 18, 2018 Report Share Posted June 18, 2018 Yours results are very inspirational! My short movie - the are three layers of Oldwood varnish with my alizarin in a weight ratio of 1 part pigment for 4 parts of varnish. The results - a very thin coating, a yellow to amber deep color. But next time I will preper my own varnish according your recipe. Quote Link to comment Share on other sites More sharing options...
Peter K-G Posted July 18, 2018 Author Report Share Posted July 18, 2018 We have an amazing summer this year with weeks of sunny and warm days (by our standard 27 - 32C) So what else is there to do than test ground&varnish Quark&Lime ground after 7 days in direct sunlight really nailed the old wood look, the reaction was amazing I haven't come even close to this with UV tubes tanning. The same ground and one really thin layer of varnish on a tanned and a white piece of wood: One more thin layer of varnish Quote Link to comment Share on other sites More sharing options...
Peter K-G Posted July 19, 2018 Author Report Share Posted July 19, 2018 Quote Link to comment Share on other sites More sharing options...
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