Est. 1998 — 27 years of woodworking knowledge
Scotch glue = hide glue ?
Bob Fawcett
>I am reading "Woodwork Joints" by Charles H. Hayward and he refers to Scotch glue in several places. I am guessing this hide glue or something similar. He also talks about heating the parts to be glued. Is my guess that Scotch glue is hide glue correct? Do any of you hide glue users heat parts?
My shop is my basement and is heated. Shop temp is usually around 70 degrees in cold weather. Would I need/want to heat parts?
Re: Scotch glue = hide glue ?
ThomD
>I believe it is hide glue possibly because of the source of the hide used to make the glue. Bravehart and all that.
I rarely heat parts myself. Ultimately the work will tell you. You need enough heat in the piece to preserve the workability of the glue. In a large veneering job, I usualy hit it over and over with a hot iron. But there are other joints, like mortises in a frame or even butt joints, where it will be harder to reheat. Often what is done there is to add more glue and let the glue hold the heat, same idea as when overusing white glue to let the excess hold needed moisture. Fortunately with hide glue one can clean excess glue away without it affecting the surfaces to be finished.
Re: Scotch glue = hide glue ?
Sgian Dubh
>In older British terminology from about 100 years ago there wasn't much available for joinery except 'glue' which was generally known to be the gelatinous extract of bones, hides, and horns of animals and fish.
That derived from fish bits was reckoned to be the strongest and this was known as Scotch or Russsian glue.
They had some interesting tricks with these glues. One was to make it water resistant for exterior work with bichromate of potash-- a teaspoonfull per half gallon was reckoned to do it, but it wasn't recommended for use with mahogany or black walnut. Quick-lime is another additive that could be used to make the stuff water resistant. I've never tried either myself as there are modern glues that already are moisture resistant or water proof. To increase the strength of the glue they added a small quantity of powdered chalk, which also shortened the drying time. Slainte.
Are you telling me
Bill Houghton, Sebastopuddle, CA - rain's back
>that the English were melting down Scots to make their hide glue? I thought that sort of thing went out with Jonathan Swift.
I'd worry about the glue seams rising up in rebellion.
Bill, proudest of his Scots ancestry (Anderson)
I'd never tell
Bob Fawcett
>you that.
If it were true I'd be in on the rebellion.
Fawcett is Irish but I'm proud to wear a McLachlan kilt. I won't post the picture.
I found this *LINK*
Bob Fawcett
>There is a company in UK that makes Scotch Glue. Looks like it is a bone glue. It is used hot like hide glue.
Sheppy Scotch Glue
Re: Are you telling me
ThomD
>Exactly, waste not want not.
Though apparently there are those who believe it is this:
http://www.sheppyindustries.co.uk/adhesives/scotch.htm
Glad I'm Welsh and Irish...
Scott Burr in rainy Ben Lomond,CA
>Not to say 1/2 Portguise (sp)...
Scott, who's had to learn trmperment and patience. Mostly the hard way...
Re: I'd never tell
john l. blue
>I remember ol' George Fawcett, the UFO investigator, you any kin, just wonderin?
Re: I'd never tell
Bob Fawcett
>I don't know the George Fawcett you mention, but George is a family name. My father and brother are both George and there are several Georges in my ancestry.