Violin Forum/Message Board Forum Index Violin Forum/Message Board
Provided by Lemuel Violins
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

ground substance possibilities?

 
Post new topic   Reply to topic    Violin Forum/Message Board Forum Index -> Violin Making and Restoration Forum
View previous topic :: View next topic  
Author Message
jethro
Member


Joined: 07 Apr 2007
Posts: 174

PostPosted: Sat Oct 08, 2016 5:11 am    Post subject: ground substance possibilities? Reply with quote

Wondering if anyone hax experimented with solids to be ground or to go in
as a ground additive?
thinking of more unusuas stuff....
like graphite or carbon disulfide,talc,quartz, or even highly colored iron or zink
compounds .... or even pure metals ground to micron size.......
possibly a thick paste mixed with linseed oil or just a dry rub ?
there used to be a product called "rub-n-buff" which was a paste loaded with
Various solid pigments. Used for picture frames.
might make an interesting starting point for coloring......
tim
Back to top
View user's profile Send private message
rs
Member


Joined: 14 Jan 2009
Posts: 188
Location: Missouri

PostPosted: Sat Oct 08, 2016 11:23 am    Post subject: Reply with quote

This is a good question. I would love to duplicate the Pietro Guarneri yellow ground. It is subtle but beautiful. Maybe one day.
_________________
Randall Shenefelt
Back to top
View user's profile Send private message Send e-mail
L P Reedy
Member


Joined: 02 Apr 2009
Posts: 248
Location: Brevard, NC

PostPosted: Sat Oct 08, 2016 5:16 pm    Post subject: Reply with quote

Many of us have tried that and some still do. I don't think graphite would help, unless you want an opaque ground. Carbon disulfide is not a solid. It is a very volatile, toxic and highly flammable liquid. I've used ground glass and rouge, long ago.
Back to top
View user's profile Send private message
jethro
Member


Joined: 07 Apr 2007
Posts: 174

PostPosted: Sat Oct 08, 2016 8:16 pm    Post subject: Reply with quote

Sorry -- big brain fart---- NOT carbon disulfide...
I ment molibidumum disulfide...... it may be opaque too ....

Was just noticing I had a rubber boat roller laying around that I never used.
It is a cylinder with a wheel on each end. Mount 2 of those on a platform
about 3 inches apart and drive 1 with a small slow motor--- then all you need is a suitably shaped jar and some ss balls.

Something like polishing rouge might be a possible component.....
I think its an ingredient of womens face powders.

There may be some off the shelf abrasives that might work as long as they are very fine ones......

I would think something tansparent or translucent would be on the possible list.... though I would think all the pigments in the commonly used oil paints are all opaque.....

Maybe I can whip up a cheap and dirty ball mill ......

T
Back to top
View user's profile Send private message
Chet Bishop
Super Member


Joined: 23 Mar 2007
Posts: 642
Location: Forest Grove, Oregon

PostPosted: Wed Oct 12, 2016 10:41 pm    Post subject: mineral ground Reply with quote

Do you mean Molybdenum disulfide?
https://en.wikipedia.org/wiki/Molybdenum_disulfide

I use gypsum powder. I mix it with coffee while rubbing it in, but it dries chalk-white. Then, as I apply my sealer, it goes completely transparent.

So far, I like the results.

This the dry mineral ground, (on a 14" viola) before sanding off the excess:


This is the same plate after applying the sealer, but no varnish:

_________________
Chet Bishop
http://www.bluefiddles.com


Last edited by Chet Bishop on Sat Oct 15, 2016 11:38 am; edited 2 times in total
Back to top
View user's profile Send private message Visit poster's website
Chet Bishop
Super Member


Joined: 23 Mar 2007
Posts: 642
Location: Forest Grove, Oregon

PostPosted: Wed Oct 12, 2016 10:52 pm    Post subject: Reply with quote

And... the same plate after varnishing:

_________________
Chet Bishop
http://www.bluefiddles.com
Back to top
View user's profile Send private message Visit poster's website
Dave Chandler
Super Member


Joined: 31 Oct 2007
Posts: 682
Location: Mt Mitchell in North Carolina

PostPosted: Thu Oct 13, 2016 6:02 pm    Post subject: Reply with quote

Well, now, am I impressed!!! Very nice and just in time, I'm working on a cello I have to have varnished by VSA time. (Not that its going, just that I'm not coming back home till March and I want to leave it set and get good and hard before polishing/finishing up.
_________________
Dave in the Blue Ridge
Southern Violin Association

"Success is the ability to go from one failure to the next with no loss of enthusiasm" Winston Churchill

"I took the road less travelled, and now I don't know where I am." Marco Polo
Back to top
View user's profile Send private message Send e-mail Visit poster's website AIM Address
Chet Bishop
Super Member


Joined: 23 Mar 2007
Posts: 642
Location: Forest Grove, Oregon

PostPosted: Fri Oct 14, 2016 10:22 am    Post subject: Reply with quote

I had intended to have this set up and playing by now, but getting ready for winter has taken priority. 8 cords of firewood in, which will be enough for at least two years, I think, and I climbed up and cleaned the chimney, just in time for the (probably 10-day) rainstorm we are now having.

Helped my wife pick all the rest of the apple crop (which she is now drying...) and then the washing-machine went on the blink. New tub-seal time, I think. That varnish should be good and hard by the time I get to it. Smile
Ah, well...sounds like life, doesn't it?
_________________
Chet Bishop
http://www.bluefiddles.com
Back to top
View user's profile Send private message Visit poster's website
FiddleDoug
Member


Joined: 08 Sep 2007
Posts: 225
Location: Hilton, NY

PostPosted: Fri Nov 25, 2016 11:07 am    Post subject: Re: ground substance possibilities? Reply with quote

jethro wrote:
Wondering if anyone hax experimented with solids to be ground or to go in
as a ground additive?
thinking of more unusuas stuff....
like graphite or carbon disulfide,talc,quartz, or even highly colored iron or zink
compounds .... or even pure metals ground to micron size.......
possibly a thick paste mixed with linseed oil or just a dry rub ?
there used to be a product called "rub-n-buff" which was a paste loaded with
Various solid pigments. Used for picture frames.
might make an interesting starting point for coloring......
tim


I don't think that you want to use anything dark/black, and opaque in a ground. It would just make the fiddle look really dirty, and not enhance anything.
_________________
Doug Wall

www.wallindependent.com
Back to top
View user's profile Send private message Visit poster's website
Franciscus
Member


Joined: 11 Jan 2014
Posts: 43
Location: Tuzla, Bosnia

PostPosted: Wed Dec 07, 2016 1:34 pm    Post subject: Reply with quote

Chet, can I ask what was the sealer for this violin?
Back to top
View user's profile Send private message
Chet Bishop
Super Member


Joined: 23 Mar 2007
Posts: 642
Location: Forest Grove, Oregon

PostPosted: Wed Dec 07, 2016 11:28 pm    Post subject: Sealer Reply with quote

On this small viola, I used a mixture of pine pitch and turpentine, with a few drops of amber dye. (transtint.)

The whole varnish procedure is in these three links:
http://www.bluefiddles.com/2016/09/finishing-sequence-part-one/
http://www.bluefiddles.com/2016/09/finishing-sequence-part-two/
http://www.bluefiddles.com/2016/10/finishing-sequence-part-three/
_________________
Chet Bishop
http://www.bluefiddles.com
Back to top
View user's profile Send private message Visit poster's website
Franciscus
Member


Joined: 11 Jan 2014
Posts: 43
Location: Tuzla, Bosnia

PostPosted: Thu Dec 08, 2016 1:58 am    Post subject: Reply with quote

Thank you very much, Chet, for the answer and for the links. I enjoyed reading.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    Violin Forum/Message Board Forum Index -> Violin Making and Restoration Forum All times are GMT - 4 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group