Primitive Archer

Main Discussion Area => Bows => Topic started by: DC on July 01, 2016, 02:15:56 pm

Title: Fuming heads up
Post by: DC on July 01, 2016, 02:15:56 pm

I had an OS with hoof tip overlays just about done and decided to fume it. After two days of fuming and two days of drying the tips popped off. They were glued with thick CA. One of the tips was warped. Don't know if it was the fumes or the moisture build up and subsequent drying. Just a heads up for anyone considering it. Do the fuming and then glue the tips on :D :D :D

Title: Re: Fuming heads up
Post by: simson on July 01, 2016, 02:48:55 pm

Ammonia and CA is a no go! Just wet a piece of wood with ammonia and drop some CA - you will be astouned what happens!

Title: Re: Fuming heads up
Post by: osage outlaw on July 01, 2016, 03:25:55 pm

How do you fume with your tip overlays on Simson?  Do you use something other than CA glue?

Title: Re: Fuming heads up
Post by: Carson (CMB) on July 01, 2016, 03:34:28 pm

Good to know!  I just had a similar experience with varnish and CA glue. I was top-coating a bow with a homemade varnish thinned with turpemtine, and next I knew the front edge of one of the tip overlays had lifted. I used dental floss and alcohol to clean under the lifted edge and got it glued back down with thin CA glue. Holding up fine now after several hundred shots.

Title: Re: Fuming heads up
Post by: simson on July 01, 2016, 05:07:07 pm

I had no problems with epoxi.
If you want use CA you have to wait until all ammonia is vaporized out of the wood.

Title: Re: Fuming heads up
Post by: DC on July 01, 2016, 11:44:20 pm

I think the accelerator for CA is a base(as in base/acid) and so is ammonia. This would make it go off early. You wouldn't think that would break down cured glue but something did. I reglued one tip and it worked fine. I put the warped one in a pot of boiling water and then clamped it to a flat board. We'll see if it stays flat tomorrow. I'm fuming a Yew bow as we speak. It has Ocean Spray tips glued with CA so we'll see what happens there.

Title: Re: Fuming heads up
Post by: osage outlaw on July 02, 2016, 06:47:35 am

Please post your results with the yew bow. 

Title: Re: Fuming heads up
Post by: DC on July 02, 2016, 10:42:58 am

Will do.

Title: Re: Fuming heads up
Post by: ---GUTSHOT---> on July 02, 2016, 09:21:03 pm

I've fumed 3 bows now. Only one with tip overlays. I used TB111 with no problems.

Title: Re: Fuming heads up
Post by: DC on July 03, 2016, 01:04:10 pm

Here's the Yew. The first picture is just to show the color. The second shows the glue line separating right at the tip. That knot is nowhere near as bad as it looks in the picture. The other tip looks good, glue line is good, but if one is coming apart I'm not going to trust the other. I'll replace them. I'll have to fume a small piece of OS and then cut tips from it. It's nice that fuming penetrates so far.