UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio and TV Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > General Vintage Technology > Cabinet and Chassis Restoration and Refinishing

Notices

Cabinet and Chassis Restoration and Refinishing For help with cabinet or chassis restoration (non-electrical), please leave a message here.

Closed Thread
 
Thread Tools
Old 28th Nov 2017, 2:47 pm   #21
Al (astral highway)
Dekatron
 
Al (astral highway)'s Avatar
 
Join Date: Nov 2006
Location: London, UK.
Posts: 3,496
Default Re: Joining polycarbonate /Perspex panels to make a case?

Quote:
I heard that chloroform was a good solvent for chemically welding perspex...!
__________________
Al
Al (astral highway) is offline  
Old 28th Nov 2017, 6:15 pm   #22
emeritus
Dekatron
 
Join Date: Jan 2012
Location: Brentwood, Essex, UK.
Posts: 5,316
Default Re: Joining polycarbonate /Perspex panels to make a case?

I have a 57ml ( = 2 fl.oz) bottle of "Plastic Weld" cement that I got from a stand at a model railway exhibition a year or so ago. It consists of Dichloromethane (Methylene Chloride), and Perspex is one of the plastics that it is stated to be suitable for welding. I have only used it on Polystyrene.
emeritus is offline  
Old 28th Nov 2017, 7:01 pm   #23
Skywave
Rest in Peace
 
Join Date: Jun 2006
Location: Chard, South Somerset, UK.
Posts: 7,457
Exclamation Re: Joining polycarbonate /Perspex panels to make a case?

Quote:
Originally Posted by Richard_FM View Post
I heard that chloroform was a good solvent for chemically welding perspex, though very hard to obtain & use!
"Very hard to obtain". Indeed: there are excellent reasons for that!

Al.
Skywave is offline  
Old 28th Nov 2017, 7:25 pm   #24
Richard_FM
Nonode
 
Richard_FM's Avatar
 
Join Date: Sep 2017
Location: Stockport, Cheshire, UK.
Posts: 2,000
Default Re: Joining polycarbonate /Perspex panels to make a case?

It was mentioned in Cyril Freezer's book of 1001 Model Railway Tips.

Even when it was written it mentioned you had to sign the poisons register to obtain it.

It can be potentially deadly even in the right hands!
Richard_FM is offline  
Old 28th Nov 2017, 8:23 pm   #25
mark_in_manc
Octode
 
Join Date: Nov 2011
Location: Manchester, UK.
Posts: 1,872
Default Re: Joining polycarbonate /Perspex panels to make a case?

You've reminded me there's a bottle at work, originally for that purpose. It's probably been there 30 years. My boss didn't know what was in it, and gave it a sniff...

[Off topic - of a similar vintage we also had several brown 1 litre laboratory bottles of Gallenkamp's finest 'Oil, Olive B.P.'. These were surplus, and I've been topping up the wife's flashy 'extra-virgin' bottle when her back has been turned for the last year or so. She doesn't seem to have noticed we have Italy's answer to the magic porridge pot.]
mark_in_manc is offline  
Old 1st Dec 2017, 8:08 pm   #26
ColinTheAmpMan1
Octode
 
ColinTheAmpMan1's Avatar
 
Join Date: Jan 2012
Location: Wimbledon, London, UK.
Posts: 1,464
Default Re: Joining polycarbonate /Perspex panels to make a case?

A few points here. A bottle of chloroform that is 30 years old could have degraded and/or evaporated during that time. Chloroform is usually stabilised with ethanol or amylene these days to prevent degradation. If your boss was daft enough to take a sniff of something in the bottle without knowing what it was, he is a fool, to say the least. Was there nothing on a label to inform him?

With regard to the poisons register, I don't think there has been such a thing for some time. There again, in my day-job before I retired, I was in a research group at Imperial College, London and we used quite a lot of chloroform - there again we were in an academic environment and educated people.

If I were you, Marc, I wouldn't use that Gallenkamp olive oil for anything culinary. Again, after 30 years it has a good chance of having degraded by oxidisation or polymerisation. The "BP" designation means that it was meant for pharmaceutical purposes anyway. "BP" is "British Pharmacopia" and indicates that.

On principle, I wouldn't take anything out of a workshop or laboratory and use it for a culinary purpose. How do you know that it isn't impure? That might mess up any experiments that you might use it for, but consuming it might do a lot more damage.
Colin.
ColinTheAmpMan1 is offline  
Old 2nd Dec 2017, 3:50 pm   #27
RojDW48
Nonode
 
RojDW48's Avatar
 
Join Date: Jun 2014
Location: Bristol, UK.
Posts: 2,074
Default Re: Joining polycarbonate /Perspex panels to make a case?

Quote:
Originally Posted by Richard_FM View Post
I heard that chloroform was a good solvent for chemically welding perspex, though very hard to obtain & use!
Quite right - it is known as Chloroform welding. Believe it or not I used to teach the technique to children (!) as part of their D&T course when I was a teacher in secondary school - carefully of course, and in a fume cupboard in a science lab. It works very well and is invisibly neat, but the surfaces have to mate perfectly - it won't 'fill' at all.

I am fairly sure it won't work with Polycarbonate.
__________________
'....don't go mistaking Paradise for that home across the road!' (Bob Dylan)

Last edited by RojDW48; 2nd Dec 2017 at 3:56 pm.
RojDW48 is offline  
Old 3rd Dec 2017, 4:31 pm   #28
G6Tanuki
Dekatron
 
G6Tanuki's Avatar
 
Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 13,953
Default Re: Joining polycarbonate /Perspex panels to make a case?

Quote:
Originally Posted by ColinTheAmpMan1 View Post
On principle, I wouldn't take anything out of a workshop or laboratory and use it for a culinary purpose. How do you know that it isn't impure? That might mess up any experiments that you might use it for, but consuming it might do a lot more damage.
Colin.
This is wise indeed: though I do have fond memories of working in an undergrad biochemistry-lab and being amused at the supervisors quaffing their coffee from 250-millilitre beakers and stirring in ANALAR reagent-grade sucrose because they were too mean to buy their own sugar!
G6Tanuki is offline  
Closed Thread

Thread Tools



All times are GMT +1. The time now is 1:51 am.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Copyright ©2002 - 2023, Paul Stenning.