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Main Boards => The Bowyer's Bench => Topic started by: Zradix on April 01, 2011, 08:44:00 AM

Title: How to reduce spring back from the mold?
Post by: Zradix on April 01, 2011, 08:44:00 AM
Hey everyone.

If you wanted to build a lam glass bow with a lot of r/d, how do you keep spring back to a minimum?

Does it help to use more core lams that are thinner rather than fewer thicker ones perhaps?

Thank you!
Title: Re: How to reduce spring back from the mold?
Post by: T Folts on April 01, 2011, 10:13:00 AM
Yes I believe that is what I have read in the past. I use three cores with glass and dont get hardly any. Some bowyers will use a minumum of six total in a stack including glass.
Title: Re: How to reduce spring back from the mold?
Post by: Bradford on April 01, 2011, 10:21:00 AM
Yep... when you use more lams the 5 lams will slide slightly against each other and create a stronger bond holding the shape.

With only a few lams you don't get as much sliding and the thicker wood wants to go back to it's original form.
Title: Re: How to reduce spring back from the mold?
Post by: GREG IN MALAD on April 01, 2011, 01:25:00 PM
Thinner lams help and so does letting it cool down before opening the form.
Title: Re: How to reduce spring back from the mold?
Post by: Zradix on April 01, 2011, 02:17:00 PM
Thanks friends!
  :thumbsup: