It is a must to degrease the wood or the horn, don´t use some of these chemical killers, just use a solution of water and pure wooden ashes. Take care: this is a killer too, it´s a base, historically used for degreasing, use some working gloves.
Wether to apply a sinew-backing to a wooden bow or to a hornbow, to precoat with a thin solution of glue several times is an additional must. Otherwise the glue can´t penetrate deep enough the wood or horn, the glueline is not as stable as it could be.
The sinew- backing needs to be well organized: the workshop has to be well tempered, the glue has to be heated up to 140F or 60C, too much heat will destroy the glue. To less heat will leave the glue to tough.
A dish of lukewarm water has to be prepared for to soak the sinew- fibre bundles about 2 minutes.
The bow has to be fixed in a small vice.
The glue has to be kept to the right temperature with some tealights. The containers used for soaking the fibre- bundles and for the glue have to fit the length of the fibres.
Go on applying bundles towards the tip of the first limb. Usually 1 bundle will cover about 1/2″ of the width of a bow´s limb. The bundles should be applied staggered for not to end up with a running through the width glue-line.
The guy helping me this post to become true is Stefan, making a Hun- type style hornbow(asymmetrical). It´s his first sinew- backing. The sinew- backing just covers the v- splice with the siyahs.
Two additional layers will have to be applied. 2 – 3 layers of sinew- backing is enough, wether it is a wooden bow or a hornbow. Otherwise to much weight is added to the bow. Waiting time is beginning just right now. The elders have left a sinew- backed bow for 4-8 months alone. I don´t know why a lot of modern “primitive bowyers” are ignoring the fact that the so- called drying of a sinew- backing is in truth a polymerization. Polymerization needs its time!
“Time is a healer, where is the patient? “(T.S.Eliot)
Next volume is dealing with the tillering of a sinew- backed bow.
- Hornbows Vol. 4- the crossbow: rough shaping, attaching the recurves (redhawk55.wordpress.com)
- BowXplosion 2011- miscellaneous news (redhawk55.wordpress.com)