8mm Forum: All B & H DCT users...

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Posted by Simon McConway (Member # 219) on September 29, 2013, 02:55 PM:

Have a look above directly above the mag head...just under the lamp. What is this white material protecting the head from the heat?????

Posted by Paul Adsett (Member # 25) on September 29, 2013, 03:45 PM:

Hopefully NOT Asbestos! [Eek!]

Posted by Simon McConway (Member # 219) on September 29, 2013, 03:52 PM:

That's what I thought!!!! We need someone to confirm!!!!

Posted by Steve Klare (Member # 12) on September 29, 2013, 04:27 PM:

If it's white and fibrous: asbestos
If it's white and smooth: ceramic

Even if it really is asbestos it's not dangerous as long as it is contained. It becomes a problem when people start machining it and releasing the fibers into the air. If you happened to work with the stuff for a living it was absolutely deadly!

Truth be told, if you are over a certain age and rode in Dad's car in traffic with the windows open, you have some in your lungs anyhow. It made great brake and clutch linings (other than the whole "dangerous"...thing) and as they wore the stuff was released into the air. It's certainly not good for you, but at low enough levels it won't make a difference.

They say when Bing Crosby made "White Christmas" they needed a nice puffy white material that would stand in for falling snow under the hot studio lights....guess what?

-and Glinda made Asbestos fall on Dorothy and her friends after they fell asleep in the poppy field!

Who's the Wicked Witch now?!!

[ September 29, 2013, 05:28 PM: Message edited by: Steve Klare ]

Posted by Paul Adsett (Member # 25) on September 29, 2013, 08:33 PM:

The old Pathescope 200B 9.5mm projectors have a layer of Asbestos in the lamp housing for insulation. Along with the fan blowing air through the lamphouse, I think it could definately be a hazardous situation.
Collectors of vintage projectors definately need to be on the look out for useage of asbestos insulation in these old machines.
I have no idea how you could safely remove it though.

Posted by Steve Klare (Member # 12) on September 29, 2013, 09:58 PM:

There are a lot of cases where removing this stuff is a lot more dangerous than leaving it in place.

In it's own right it's amazing stuff: excellent insulator, completely flame proof, great sound deadener, but unfortunateley it took a couple of decades before people realized how dangerous it really is.

The nice thing about it (as hazardous wastes go) is that it's pretty easy to dispose of. If you expose it to high enough temperatures the fibers melt and when it rehardens it's just glass.

Posted by Maurice Leakey (Member # 916) on September 30, 2013, 03:51 AM:

It's white and rough, obviously to protect the head from heat from the lamp, which on the DCT is a 150 watt.
Whatever it's made of there's no need to touch it.

Posted by Mark Todd (Member # 96) on September 30, 2013, 04:27 AM:

I believe there are western countries still sell it to developing ones with little or no regulations or health care.

Also I think you can still get it in odd things from overseas like heaters etc sometimes.

Its actually floating around to a degree in the air all around us, its like a Genie out of a bottle, its perssistant stuff.

They do say MDF will be the new " A " when it pops. Though more to do with actually working with it.

Best Mark.

Posted by Lee Mannering (Member # 728) on September 30, 2013, 05:14 AM:

Quite right Mark, MDF is very dodgy stuff which even contains formaldehyde as a bonder so use it at your peril. A few years ago concerns were raised about it being used in confined spaces along with fine dust inhaled from the wood. If you have to use MDF make sure it is made in Europe as outside manufacturers will no doubt be using much higher concentrates of binders.

Posted by David Ollerearnshaw (Member # 3296) on September 30, 2013, 04:41 PM:

Scary stuff.

Formaldehyde 1

Formaldehyde 2

Asbestos

When I used to work for BT the fire stopping compound was asbestos based in the older building and most panels had a stick put on them warning you may contain asbestos.

This has got me thinking about exposure to it, I must make some checks.

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