Thread: Glue for Coticule

This one is a real Beauty, Artan!

Carrie are you sure you don't use a double edge blade?

I recommend epoxy.
-Chief

Originally Posted by BHChieftain

I recommend epoxy.
-Chief

I agree, I used regular slow set epoxy on a coticule and it worked very well. I believe it is still the standard for applying backings in lapidary work.

I used some epoxy to join a vintage coticule recently. It was a glued yellow/bbw and I let it slip from my fingers one day and it fell a few inches to a table top. The two halves separated and the yellow broke one third of the way from the end. After I dried my tears I had to lap the residue off of the glued portion to re-glue.

I used Loctite Professional Epoxy that I picked up at Home Depot. This stuff is really good and I have used it for other things and always so far so good. Now when I put the three pieces together everything seemed to line up perfectly to where it appeared that once cured I would be able to lap the hone and run a razor over the cracked portion without catching the crack.

I laid it on a countertop and applied the epoxy and then I put a couple of diamond plates on it for weight. Unfortunately whether from the weight or being mistaken as to the position of the broken yellow the edge catches the cracked area.

So I put the hone in the oven at 200 degrees for 45 minutes and it was still stuck firmly together. I soaked it for a week and no change. So the moral of my story is if you use epoxy make certain that you have the pieces where you want them to start with.

Originally Posted by JimmyHAD

I used some epoxy to join a vintage coticule recently. It was a glued yellow/bbw and I let it slip from my fingers one day and it fell a few inches to a table top. The two halves separated and the yellow broke one third of the way from the end. After I dried my tears I had to lap the residue off of the glued portion to re-glue.

I used Loctite Professional Epoxy that I picked up at Home Depot. This stuff is really good and I have used it for other things and always so far so good. Now when I put the three pieces together everything seemed to line up perfectly to where it appeared that once cured I would be able to lap the hone and run a razor over the cracked portion without catching the crack.

I laid it on a countertop and applied the epoxy and then I put a couple of diamond plates on it for weight. Unfortunately whether from the weight or being mistaken as to the position of the broken yellow the edge catches the cracked area.

So I put the hone in the oven at 200 degrees for 45 minutes and it was still stuck firmly together. I soaked it for a week and no change. So the moral of my story is if you use epoxy make certain that you have the pieces where you want them to start with.

I just noticed that with this post, Jimmy has reached
5000 posts!
Of course, by the time I finish typing this he'll have 5012 probably!

Congratulations and thank you for all your help Jimmy!!!

Originally Posted by Utopian

I just noticed that with this post, Jimmy has reached
5000 posts!
Of course, by the time I finish typing this he'll have 5012 probably!

Congratulations and thank you for all your help Jimmy!!!

Thanks Ron, it is really funny but when I finally saw your post I looked at my post count and it was 5,012. Obviously I've got way too much time on my hands.

When my coticule/BBW separated, I lapped the two faces to get the old glue off, then I used silicon rubber (tube type) to stick the two parts together.
The silicon was meant to be used on roof gutters and guaranteed for 25 years so it is more than adequate for the job.
After spreading the silicon thinly, evenly and completely on one face to be stuck, I put the other one on and moved the two parts back and forth lengthwise to seat them and to squeeze excess silicon out. The two parts can be adjusted quiet late but must be left to set for at least a few days. Mine has a join of about 3/4mm.
Excess glue can be cut or scraped off when it is set completely.
With this method, you must work cleanly and not spread silicon everywhere but use recommended solvent to remove mess.
I guess you can use a sharp thin knife or hot piano-guitar wire to separate parts.

Originally Posted by 0livia

This one is a real Beauty, Artan!

Carrie are you sure you don't use a double edge blade?

I'm sure, they are single edge blades.