Author Topic: grooving vs roughing up  (Read 1293 times)

0 Members and 1 Guest are viewing this topic.

Offline Mafort

  • Member
  • Posts: 431
grooving vs roughing up
« on: April 07, 2025, 02:49:22 pm »
so im aware that grooving is the commonplace method to attach horn to a core but ive read that some horn strips were merely roughed up prior to gluing and my question is how was this done? where both surfaces roughed up with a heavy file and then glued together?

Offline superdav95

  • Member
  • Posts: 2,269
  • 3432614095
Re: grooving vs roughing up
« Reply #1 on: April 07, 2025, 11:51:51 pm »
Ive done lighter weight horn bows 50lbs and under that were only roughed up for the horn glue up.  anything over 60lbs i would suggest grooving for increased glue surface area.  I used 36 grit paper.  I have also used a gimping file too that worked well too.  a fine gimping file from my knife making days.  The most important aspect for good horn glue up using natural hide or sinew glue is good thorough sizing with very thin glue.  I also warm up my horn slats and glue surface while applying the first few layers of sizing glue.  this is the most crucial part of horn glue up.  In my opinion it more important then grooving.  hope this helps
« Last Edit: April 18, 2025, 04:04:10 pm by superdav95 »
Sticks and stones and other poky stabby things.

superdav95@gmail.com

Offline Mad Max

  • Member
  • Posts: 550
Re: grooving vs roughing up
« Reply #2 on: April 08, 2025, 02:53:08 pm »
For a 1-1/4" wide bow.
with all the up down's with the groves, it would be about 2-5/8" of glue surface.
Twice the glue surface :o
I would rather fail trying to do something above my means, Than to succeed at something beneath my means.

Offline Mafort

  • Member
  • Posts: 431
Re: grooving vs roughing up
« Reply #3 on: July 02, 2025, 05:41:56 pm »
so i grooved and glued up y horn however instead of using rope i used clamps. i only have enough clamps to do one side at a time. i was wondering how long i should leave the horn clamped onto the one limb for before i risk taking them off and clamping down the other limb. ive seen a few hours in some older videos and ive seen a couple months in some.