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 > Hints, Tips and Solutions (Do NOT post requests for help here)

Notices

Hints, Tips and Solutions (Do NOT post requests for help here) If you have any useful general hints and tips for vintage technology repair and restoration, please share them here. PLEASE DO NOT POST REQUESTS FOR HELP HERE!

Closed Thread
 
Thread Tools
Old 22nd Apr 2017, 9:51 am   #1
awc
Retired Dormant Member
 
Join Date: Jul 2005
Location: Somerset, UK.
Posts: 334
Default Cleaning records with PVA Glue - A tip

I only clean records with this type of glue when they are in a bad way and conventional cleaning has failed.

When doing a recent batch however, I found that when dried and I went to remove it, the glue fragmented and it took a great deal of effort and fiddling about to fully remove.

As the glue had been seemingly thicker than usual when being applied, I decided to see if buying some new glue would make a difference.

Well, it made all the difference in the world, as the dried glue easily came off in one piece and left a pristine looking disc behind.

Moral: Always use freshly purchased glue!

Alex
awc is offline  
Old 23rd Apr 2017, 12:08 am   #2
Skywave
Rest in Peace
 
Join Date: Jun 2006
Location: Chard, South Somerset, UK.
Posts: 7,457
Question Re: Cleaning records with PVA Glue - A tip

Interesting: makes me wonder if when gluing wooden joints using old PVA produces joints with less strength than when using new adhesive.

Any suggestions, anyone?

Al.
Skywave is offline  
Old 23rd Apr 2017, 3:47 am   #3
Bazz4CQJ
Dekatron
 
Bazz4CQJ's Avatar
 
Join Date: Apr 2009
Location: Oxfordshire, UK.
Posts: 4,923
Default Re: Cleaning records with PVA Glue - A tip

In the days when I worked for Royal Ordnance, all of the paints and adhesives which we used had rigid use-by dates, even when un-opened. It was generally believed that many/most polymeric materials of that kind tend to undergo cross-linking of molecules as they age and so their properties change.

B
__________________
Saturn V had 6 million pounds of fuel. It would take thirty thousand strong men to lift it an inch.
Bazz4CQJ is offline  
Old 23rd Apr 2017, 7:03 am   #4
dseymo1
Retired Dormant Member
 
Join Date: Dec 2007
Location: Shropshire, UK.
Posts: 3,051
Default Re: Cleaning records with PVA Glue - A tip

It's usually recommended that PVA isn't exposed to frost, so storage conditions clearly affect it.
Cross-linking over time certainly seems likely, as even cooking oil will turn into varnish if left too long!
dseymo1 is offline  
Old 23rd Apr 2017, 7:16 am   #5
Craig Sawyers
Dekatron
 
Craig Sawyers's Avatar
 
Join Date: Nov 2010
Location: Oxford, UK.
Posts: 4,941
Default Re: Cleaning records with PVA Glue - A tip

Quote:
Originally Posted by dseymo1 View Post
as even cooking oil will turn into varnish if left too long!
That is the whole principle behind furniture oil, like Danish and Teak oils. These have oxidation accelerators so that they harden in a day or so. But back before those, furniture makers used linseed and vegetable oils like walnut. Hardening times for a single coat was weeks (bit like cooking oils), and several coats were needed to finish a piece of furniture that way. And that was the driving force behind French Polish, each coat quick drying, and you can finish a piece really quickly (5 or 6 sessions of ten minutes each spread over a day or two)

Craig
Craig Sawyers is offline  
Closed Thread

Thread Tools



All times are GMT +1. The time now is 2:26 pm.


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.