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Re: [ATM] optics cleaner

The MSDS page was for "flexible collodion".  The ATS page (oldscope) 
specifically cautioned against the flexible kind - use only 'Collodion 
USP'.  The MSDS for that is 
http://www.jtbaker.com/msds/englishhtml/c5060.htm

There's no castor oil in that one.

James Gort




Mark Holm wrote:
>
> I find the 5% castor oil listed rather interesting from an optics
> cleaning point of view.  I know why it is there.  It plasticizes the
> nitrocellulose.  That is, it makes the nitrocellulose more flexible,
> less brittle.  I would expect it to leave a little castor oil residue on
> any surface it was in contact with.  This would not be ideal for optics
> cleaning.
>
>
>   
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