Vintage Coticule Glue... separation/cleanup?

[SliceOfLife]

Does anyone have any experience deliberately separating vintage glued coticules from their bbw? I've had many that came apart on their own which I bought, but I've never tried separating any that were holding. I'd like to separate and flip certain glued combos that were hybrid on the bottom of the yellow.

 

[LJS]

If it is old enough to be hide glue then heat works. The rest I am unsure of.

 

[David]

I’ve done it once on a vintage. I put it in the oven at 200 degrees, left it for 10 minutes and then checked it every 5 minutes. I don’t recall the exact time but in less than 30 minutes I was able to pull it apart.

 

[timwcic]

Hot Florida sun for the day or 180 degree over for 30 minutes gave me good luck if vintage. Had no luck on contemporary stones yet

 

[SliceOfLife]

Thanks everyone. I was hoping heat was gonna be the solution. I'll update on results once I get it done.

 

[musicman980]

I did exactly this a few years back. There was hybrid underneath the yellow and I wanted to flip it around.

Here's the stone before separation: Vintage Les Latneuses - https://www.badgerandblade.com/forum/threads/vintage-les-latneuses.542801/

and the hidden hybrid: 175 x 40 Les Latneuses - https://www.badgerandblade.com/forum/threads/175-x-40-les-latneuses.567763/



Here's a video of me separating a different coticule from it's BBW. I used the oven to heat the whole thing up:

 

[RobbyC]

I’ve done a lot, a few just to see what was underneath, and some because they had over time moved so that the two pieces weren’t sitting flush
I normally use a washing up bowl of which I run increasingly hot water into (hot tap is near boiling on full heat)
Usually separates fairly quickly and the gradual heat up prevents any damage from sudden heating
Rob