Prism separation.

[Alex Varas]

Hi all,

Any idea (not by force) to unglue this? It's the prism/rangefinder of a Super Ikonta BX. Not Xilene, I can't with the smell.



Thank you in advance,
Alex

 

[trendland]

Hi all,

Any idea (not by force) to unglue this? It's the prism/rangefinder of a Super Ikonta BX. Not Xilene, I can't with the smell.



Thank you in advance,
Alex

Hi Alex I shot with camera of a friends father but it wasn't the same! I just googled it to inform about model!

That's here the BX 533

so this here is the part you asembled. (hart to identify from your shot BTW)

!

 

[trendland]

How to proceed? Do you want to obtain the original glass? It is glass (no plastic) right!
How about an ultrasonic cleaning device - perhaps you can loan one?

A different way - the easy one - is to replace the glass (but then it isn't original I see)!

My preference would be a good shape from new glass (to have a clear view through)!
And then the finishing of coressive metal parts would be easyest going!

with regards

PS : Remember some coressive pre war Leicas after bress polish!

 

[trendland]

Would ultrasonic work? For sure in case of trouble you would have the need to ultrasonic
2 - 3 weeks (therefore you should loan a good device)!

But wait before you shoot with cannons ......perhaps try hot water bath with normal soap
(hair shampoo a.s.o) ........pretty good to clean G3 rifle during service btw with the danger to be
arrested...in some cases shampoo from high concentration can cause a wonder over night!

Bon Chance Alex

 

[Nodda Duma]

Hi Alex,

If it’s all metal and glass (no plastics or leather), I’d drop it in a mason jar of your favorite solvent, put a lid on the jar and leave it for a couple weeks. Xylene would be best to dissolve the old cement...the sealed jar will keep the fumes in.

 

[Alex Varas]

Hi Alex I shot with camera of a friends father but it wasn't the same! I just googled it to inform about model!

View attachment 222837
That's here the BX 533
View attachment 222838

so this here is the part you asembled. (hart to identify from your shot BTW)

!

That's the model yes, buy the prism is inside, outside it's just a normal glass.

 

[Alex Varas]

Hi Alex,

If it’s all metal and glass (no plastics or leather), I’d drop it in a mason jar of your favorite solvent, put a lid on the jar and leave it for a couple weeks. Xylene would be best to dissolve the old cement...the sealed jar will keep the fumes in.

It's only glass, painted black mostly but not the ends, I have black matte paint so it could work. I would submerge only the prism where it's goued not the whole piece.

More options?

 

[jim10219]

It depends on the glue used. Pick a solvent and give it a try. My usual progression for dissolving unknown glues is isopropyl alcohol (or denatured alcohol), naphtha, acetone, high heat, and lastly, methylene chloride. One of those chemicals will dissolve just about anything. Be careful with the last few on that list, as they can be quite dangerous. The high heat is good for epoxies like JB Weld. Though with glass, you have to be careful, and raise the temperature slowly so you don't crack it.

 

[Alex Varas]

Submerging? Or starting with where the prisms join?

 

[crumbo]

Maybe dribble small amounts of acetone, MEK, etc., around the edge to soften the adhesive? I wouldn't dunk, though. And/or careful application of heat from a heat gun -- some adhesives from this era "cure" rather than "dry".

 

[Alex Varas]

https://flic.kr/p/2eABJTC

Done the splitting, any dissolvent would take long time.
Glass with water, prism submerge, oven at 180 Celsius degrees did the job.
Now it’s clean and ready to be glued.