Search found 10 matches

by Michael Richwine
Wed Feb 22, 2012 9:01 pm
Forum: Bowed Stringed Instruments and Bows
Topic: How do you handle this - economy violin repair
Replies: 9
Views: 8067

Re: How do you handle this - economy violin repair

Might want to measure carefully. If it's a saddle crack, it may well be far enough outside the bass bar to allow cleats. If it were mine to do, humidify the instrument to close the crack, then work thin hide glue into the crack, probably pushing up from underneath just a bit to open the crack up to ...
by Michael Richwine
Wed Feb 15, 2012 9:58 pm
Forum: Glues and Finishes
Topic: white finish on flamed maple
Replies: 5
Views: 3058

Re: white finish on flamed maple

It's pretty simple, but it depends on the look you're after. The easiest would be to get some Behlen's 15 minute wood stain in White, thin it around 50/50 with Behlen's reducer for 15 minute stain, and apply it to the wood like you would with kitchen cabinets, wipe thoroughly. The look and amount of...
by Michael Richwine
Wed Feb 08, 2012 5:42 pm
Forum: Glues and Finishes
Topic: Drying French Polish with UV
Replies: 5
Views: 4626

Re: Drying French Polish with UV

Oil is used as a lubricant in applying French polish, but very little, if any, is incorporated into the finish. I just use paraffin oil, which doesn't dry, anyway.

One of my colleagues here is from Dublin. He says the weather here is generally colder, but not so damp & windy as it is there.
by Michael Richwine
Wed Feb 08, 2012 4:46 pm
Forum: Glues and Finishes
Topic: Joint creep?
Replies: 9
Views: 6204

Re: Joint creep?

I've run across two common reasons for raised glue lines: Changes in wood moisture content: If wood is not sufficiently dried, or is moved into a drier environment than where it was stored, it can shrink, in width as well as in thickness. A PVA or aliphatic glue line will allow the wood to "creep" a...
by Michael Richwine
Mon Feb 06, 2012 7:48 pm
Forum: Glues and Finishes
Topic: aerosol nitro lacquer over minwax oil-based stain?
Replies: 6
Views: 5268

Re: aerosol nitro lacquer over minwax oil-based stain?

Minwax stains are mostly a mix of pigments and dyes with an alkyd binder, IIRC (Haven't used them in years). Painters topcoat Minwax stains with lacquer all the time. No problem, as long as you let the stain dry thoroughly so all the solvents escape. Recoat too soon, and you can get a "bloom" - whit...
by Michael Richwine
Mon Feb 06, 2012 7:38 pm
Forum: Glues and Finishes
Topic: Drying French Polish with UV
Replies: 5
Views: 4626

Re: Drying French Polish with UV

Barry Daniels wrote:Michael and Emmanuel,

I hadn't seen either of you on the MIMF before so let me welcome you aboard.

Michael, Sounds like you got some good experience in the finishing area.
Thanks for the kind words. As far as finishing experience goes, something over 40 years professionally..... ;)
by Michael Richwine
Mon Feb 06, 2012 7:31 pm
Forum: Bowed Stringed Instruments and Bows
Topic: Violin rib thickness....why?
Replies: 19
Views: 18645

Re: Violin rib thickness....why?

E H Roth violins from the 1920s are known for thick ribs. They are also known for how much better they sound when the ribs are thinned to a more standard thickness.The ribs actually radiate a lot of sound. On trade violins, I wouldn't think that they'd make all that much difference, but on better in...
by Michael Richwine
Thu Feb 02, 2012 9:59 pm
Forum: Bowed Stringed Instruments and Bows
Topic: Old violin -renew fingerboard?
Replies: 7
Views: 7899

Re: Old violin -renew fingerboard?

On a full sized violin, the fingerboard will be about 270 mm, exclusive of the nut. Thickness of the fingerboard does affect the sound a bit, sometimes for the better, sometimes for the worse. Fingerboards are planed and dressed (resurfaced) as routine maintenance: remove nut, plane out the worn spo...
by Michael Richwine
Thu Feb 02, 2012 9:38 pm
Forum: Glues and Finishes
Topic: Drying French Polish with UV
Replies: 5
Views: 4626

Re: Drying French Polish with UV

We use UV cabinet for drying oil varnish on violins, but French polish is an evaporative finish, and any crosslinking the resins do would take place over a period of years. I think UV would do more harm than good, since it is generally the #1 enemy of clear finishes, when it's not being used to acce...
by Michael Richwine
Thu Feb 02, 2012 9:29 pm
Forum: Glues and Finishes
Topic: Hide glue testing.
Replies: 6
Views: 5022

Re: Hide glue testing.

Hi Samuli, There are ultra high-quality options like isinglass, which is made from sturgeon bladder, and used by glass artists, but it is very expensive and offers no real benefits, while having a shorter working time. FWIW, we've been making our own isinglass glue for over 15 years now, importing ...