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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!

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Old 8th Jan 2016, 10:42 pm   #1
Karen O
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Default Source of interesting card

I was about to throw an empty Alpen box when I noticed that the card it is made from reminded me of the sort of card that was once used to line batteries, provide dividers and PCB 'sharp side' protection. It is thin, dark and likely impregnated with something to make it waterproof. By sticking two sheets together face to face, you could hide its cereal origins

Now I'm curious what that sort of card was called in the day. I suspect the real stuff was varnished or something.

Anything to promote healthy eating, eh

Last edited by Karen O; 8th Jan 2016 at 10:45 pm. Reason: Typo and humourous finish
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Old 9th Jan 2016, 2:26 am   #2
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Default Re: Source of interesting card

Quote:
Originally Posted by Karen O View Post
Anything to promote healthy eating, eh
Wot? With the amount of sugar in it?


If it is waterproof, it might be better for gaskets than cornflakes packet card
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Old 9th Jan 2016, 10:31 am   #3
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Default Re: Source of interesting card

I needed something similar for a gasket between the stator and movement of a 1930s striking electric clock. This would have been ideal. I had to make do with "normal" cardboard from a Cornflakes packet!

https://www.vintage-radio.net/forum/...ad.php?t=89617
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Old 9th Jan 2016, 12:59 pm   #4
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Default Re: Source of interesting card

Cereal box and a coat of PVA, stiffens and waterproofs.
Made gaskets this way for years.
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Old 9th Jan 2016, 3:02 pm   #5
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I always check the packaging in our bin just in case, recently a very good bit of plastic sheet came from a set of table mats. It's clear hard and about 0.3mm thick.
 
Old 9th Jan 2016, 9:35 pm   #6
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Default Re: Source of interesting card

Before you throw out your Christmas wrapping paper ,keep the cardboard tube .
It could possibly be used to house u2 batteries in your radios !
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Old 9th Jan 2016, 10:58 pm   #7
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Default Re: Source of interesting card

I wonder if boiling regular card in parafin wax would achieve the same effect? A process used for cardboard coil formers to avoid damp compromising their effectiveness - gently heat in molten wax until the card ceases to give out air bubbles. Of course if you've got the waxed packets you won't need to!
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Old 10th Jan 2016, 3:55 pm   #8
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Default Re: Source of interesting card

What is that smell in my kitchen? You're not boiling up that tar pot again on my nice new ranger cooker... J.
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Old 10th Jan 2016, 10:26 pm   #9
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Default Re: Source of interesting card

Fortunately I live by myself, but the gf wouldn't approve at all. I'd have to live in the shed. It's a good use for those candle ends! And my cooker's an early 1950's New World Radiation. Must not stray ot. Needs an appropriately shaped pot/baking tray or you need gallons of wax.
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Old 11th Jan 2016, 9:55 pm   #10
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After seeing this post, I noticed an empty WINALOT (dog biscuit ) box in the recycling. Lots of doggy owners on here, so perhaps the empties might be worth looking at.
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Old 12th Jan 2016, 5:39 am   #11
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Default Re: Source of interesting card

Aunt Bessie's products use the same type of cardboard on some of it's packaging and in order to be recycling efficient, I tend to tear up my cardboard boxes but, these Aunt Bessie ones defy being torn up....tuff stuff it is !
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Old 12th Jan 2016, 9:22 pm   #12
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Default Re: Source of interesting card

Strange you should mention cardboard food boxes!!

Having just glued the meter glass back in place and generally cleaned and polished a Taylor 127A whilst scoffing Rivita Thins and cheese, I realized that the food box could be put to good use.
A satisfactory way of squaring up and restoring the broken corners of the original meter packaging. Lashings of Copydex and nothing visible externally.

The meter was intercepted before it got to the skip and is now fully functional.

BTW my wife wasn't around to witness the abuse of her clothes pegs

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Old 13th Jan 2016, 12:43 am   #13
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Default Re: Source of interesting card

Ah, OT I know, but I have one of those meters, re-badged as a GPO something or other. It lives in my surgery at work and has saved the day on many occasions.
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Old 13th Jan 2016, 4:54 am   #14
Karen O
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I have visions of you checking the resistance of your patient's amalgam
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Old 13th Jan 2016, 2:22 pm   #15
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Default Re: Source of interesting card

Hi Karen, I think the card you are refering to is known as NOMEX, a DuPont product, I use it for transformer insulation. It is still available from many sources. Here is a brief description from here.
http://www.professionalplastics.com/NOMEXPAPER

“ Nomex® Aramid Paper Sheets & Tubes - DuPont Nomex is a high-temperature resistant insulation product with an excellent balance of physical and electrical properties. Nomex is made entirely from synthetic aramid polymer in two forms: short fibers (floc) and microscopic fibrous binder particles (fibrids). Nomex has been widely adopted as electrical insulation for liquid and dry transformers, motors, and generators.
Nomex Types: •Nomex Type 410 is a calendered insulation paper which offers high inherent dielectric strength, mechanical toughness, flexibility and resilience. Type 410 is the original form of Nomex paper, and is widely used in a majority of electrical equipment applications. Available in 11 thicknesses (2 to 30 mils, or .05 to .76 mm), Type 410 is used in almost every known electrical sheet insulation application. Nomex 410, will maintain 300 V/mil (12 kV/mm) dielectric strength for several hours ar 400°C (750°F)… “
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Old 13th Jan 2016, 7:42 pm   #16
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Default Re: Source of interesting card

Before Nomex became available, there was Presspahn and "Elephantide".
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Old 13th Jan 2016, 9:13 pm   #17
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Presspahn are still very much with us, only a couple of miles from where I live: http://www.presspahn.com/
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Old 16th Jan 2016, 6:50 pm   #18
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Default Re: Source of interesting card

Quote:
Originally Posted by Boater Sam View Post
Cereal box and a coat of PVA, stiffens and waterproofs.
Made gaskets this way for years.
Sam, while not doubting the success of your gasket making method as you've been doing it for years, but PVA is water soluble? As it dissolves in water, it surely cannot make the gasket waterproof?
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Old 22nd Jan 2016, 8:56 pm   #19
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Default Re: Source of interesting card

Hi

It's probably well known already but card from cereal boxes is particularly useful as a template material in metal fabrications. It is a quick method of finding the correct shape of the required metal plate.

Regards
Symon.
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Old 15th May 2016, 12:27 am   #20
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Default Re: Source of interesting card

You can check with your local electrical supply house. Ask for 'Fish Paper". (At least that is what it is called here). It comes in red, grey, and black. I bought a couple of rolls of it, and find it quite useful.
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