Coating on older DEC slides

[couryhouse]

Yes that is what was used... and yes too much is bad.. beryllium is way worse
. William Hansen at varian died from itEd#  






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-------- Original message --------
From: Rod Smallwood <rodsmallwood52 at btinternet.com> 
Date: 06/13/2015  2:23 PM  (GMT-07:00) 
To: General at classiccmp.org, "Discussion at classiccmp.org:On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> 
Subject: Re: Coating on older DEC slides 

Ever looked at an old radio chassis?
They had what I was led to believe was a grey cadium plating over the steel

The boxes BA11-ES and the like had I think a coat ing was some kind of 
Nickel
My 11/34A has a greyish coating on the tiltable runners.


On 13/06/2015 21:35, COURYHOUSE at aol.com wrote:
> cadmium not  good  for  you... beryllium is  even  worse!
>   
> Ed#
>   
>   
> In a message dated 6/13/2015 12:51:52 P.M. US Mountain Standard Time,
> rodsmallwood52 at btinternet.com writes:
>
> It might  be cadmium
>
>
> On 13/06/2015 16:45, John Wilson wrote:
>> On Sat,  Jun 13, 2015 at 11:20:19AM -0400, Noel Chiappa wrote:
>>> So, what  _is_ that grey coating - and, more important, how (if at all)
> can  it
>>> be reproduced these days?
>> Wild guess:  some kind  of oxide?  I agree that it doesn't look like paint
>> or powder  coat.
>>
>> John Wilson
>> D  Bit
>