Primitive Archer

Main Discussion Area => Bows => Topic started by: Newbreedarcher on February 15, 2015, 11:57:02 am

Title: Preparation for sinew backing
Post by: Newbreedarcher on February 15, 2015, 11:57:02 am
So, I had read an article a ways back that had talked about using hardwood ash-paste to scrub the back of osage down before sinew is applied. Has anyone had success with this? If so, can you am describe the process? It's been a while and I can't remember where i had seen the article. Thanks!


Nick
Title: Re: Preparation for sinew backing
Post by: JonW on February 15, 2015, 01:54:44 pm
I've never done it but it would be the same as Lye or oven cleaner. I know some guys do that.
Title: Re: Preparation for sinew backing
Post by: bradsmith2010 on February 15, 2015, 02:54:13 pm
scrub with ash and water,, wash with soap and rinse with boiling water,,three times
Title: Re: Preparation for sinew backing
Post by: Pat B on February 15, 2015, 03:03:52 pm
I prep the back of a bow to be sinewed with a good scrub with Dawn dish soap and rinse it with boiling water. Works great, less messy!   ;)
Title: Re: Preparation for sinew backing
Post by: Markus on February 15, 2015, 05:35:24 pm
Pat do you let the bow dry before sinewing? ( Have never worked Osage) Markus
Title: Re: Preparation for sinew backing
Post by: bradsmith2010 on February 15, 2015, 05:47:53 pm
it does not take long for the bow to dry,,, so it would be dry when you start,,, size the bow with glue and let that dry a bit
Title: Re: Preparation for sinew backing
Post by: JoJoDapyro on February 15, 2015, 05:49:26 pm
Have a pot of warm water handy. It is a mess. My fingers were pruny an white for a few hours last night after my one ounce.
Title: Re: Preparation for sinew backing
Post by: Pat B on February 15, 2015, 08:08:33 pm
I usually get the first coat of hide glue within a few minutes. I think that the wet(not dripping) wood allows the glue to penetrate better. Dry wood sometimes repels water for a while. This way I'm assured clean wood and good wood/glue adhesion.
Title: Re: Preparation for sinew backing
Post by: Newbreedarcher on February 25, 2015, 03:17:26 pm
I applied the sinew to my osage bow. It has very little crown, none really. I keep having a problem with the sinew curling from the edges. I have rapped the bow with linen sheets heated it till it seeps from the threads. Wrapped with inner tube and done the same to the point the sinew blends with the bow so good you can't really tell where the sinew ends and the bow starts. I have rehydrated the edges and reapplied glue. It keeps curling at the edges. I prepared the bow by washing with dawn and rinsing with boiling water. I also scored the back with a hacksaw blade. Could this be because it's drying too fast? Do I just suck at this?? Haha, I can't seem to find anyone else that has this issue.😞
Title: Re: Preparation for sinew backing
Post by: bradsmith2010 on February 25, 2015, 03:44:38 pm
i am not sure what you mean curling at the edges,, but if you get the glue to hot,, it will make the sinew curl,,
Title: Re: Preparation for sinew backing
Post by: Newbreedarcher on February 25, 2015, 03:48:21 pm
It's drying on the edges and pulling away from the back of the bow
Title: Re: Preparation for sinew backing
Post by: PEARL DRUMS on February 25, 2015, 04:49:03 pm
If the back was oaky before sinew, then just scrape that outside 1/4" off both sides both limbs. Its dead weight for the most part. That center crown is doing the work. Why its curling up? You got me. Ive sinewed several bows and have never done anything more than scuff the back with 50 grit, size it with hide glue, wait a day and lay down 3-4 courses. Never had any issue with any of them.
Title: Re: Preparation for sinew backing
Post by: DC on February 25, 2015, 04:53:33 pm
Just to be sure, you are using hide glue? I couldn't find where you said.
Title: Re: Preparation for sinew backing
Post by: Newbreedarcher on February 25, 2015, 05:32:35 pm
I'm using swim bladder glue.
Title: Re: Preparation for sinew backing
Post by: Newbreedarcher on February 25, 2015, 05:35:53 pm
Thanks guys for the help with this. This is my first osage bow and first sinew backed bow, maybe I can make a video of what is happening.