Trad Gang

Main Boards => Trad History/Collecting => Topic started by: Rubiolio on November 12, 2007, 06:38:00 AM

Title: What glues were used in early 50's glass
Post by: Rubiolio on November 12, 2007, 06:38:00 AM

Anybody know what resins were used in early 50's bows? I have a Bear Cub 49# from about 1954 that looks like it's had a hard life yet still shoots perfect and still pulls 49# at 28". What is the thin red lam/line between the glass and the wood. I'm amazed that what must have been a new technology at the time has stood the test of time so well.

Title: Re: What glues were used in early 50's glass
Post by: Matt E on November 12, 2007, 07:55:00 AM

Most old bows were put together with resorcinol, It leaves  a line between laminatons as you described. It is still one of the top glues today. Hard to improve on some of the old products.

Title: Re: What glues were used in early 50's glass
Post by: Rubiolio on November 12, 2007, 09:27:00 AM

Thanks, I thought it might be, have used resorcinol
in boatbuilding but didn't know it could be used with glass. How about the resin in the glass itself, is that polyester or an early epoxy?

Title: Re: What glues were used in early 50's glass
Post by: Matt E on November 12, 2007, 04:03:00 PM

I don't know anyhing about the composition of the glass binder.

Title: Re: What glues were used in early 50's glass
Post by: Rubiolio on November 12, 2007, 04:54:00 PM

I doubt that any of the current crop of cammed contraptions will be shootable after 50 years of knocking about.

Title: Re: What glues were used in early 50's glass
Post by: aromakr on November 19, 2007, 09:42:00 PM

Rubiolio:
Some of the early Bear's had a thin strip of puprle heart or cocabola between the glass and maple riser. Resorcinol was not used with glass only wood to wood.
Bob

Title: Re: What glues were used in early 50's glass
Post by: Liquid Amber on December 04, 2007, 08:15:00 AM

According to Walter L. Miller in his scarce classic "Making Modern Composite Bpws [1958]," Urac 185, Resorcinol and Epoxy Resin Glue [A-1 or C-3] were recommended.