RE: Inquiry on clean coverslips needed
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From: | Jim Hall <rmkdhjh@ucl.ac.uk> |
To: | "Gary W. Gill" <garywgill@email.msn.com>, "MacDonald, Jennifer" <jmacdonald@sach.org>, histonet <histonet@pathology.swmed.edu>, "'Gayle Callis'" <uvsgc@msu.oscs.montana.edu> |
Reply-To: | |
Date: | Mon, 16 Aug 1999 09:20:36 +0100 |
Content-Type: | text/plain; charset="us-ascii" |
I can confirm that glass coverslip manufacturers do use coverslips with a
dusting of fine glass particles to prevent their sticking to-gether. I
obtained this information some time ago from the manufacturers themselves.
Jim.
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At 19:14 15/08/99 -0500, Gary W. Gill wrote:
>Jennifer:
>
> Never heard that explanation before. The "fine dust" is said to be
>produced by action of moisture on glass, which produces hydrochloric acid,
>and which etches glass. It was for this reason that Clay-Adams introduced
>hermetically sealed cover glass cases with enclosed silica gel. The latter
>finds its way today into individual boxes of cover glasses with teeny tiny
>silica gel bags.
>
> Richard-Allan introduced the cleanest cover glasses around in the 1970s by
>cutting and packing them in environmentally clean rooms: positive pressure
>rooms, temperature and humidity controlled, HEPA filtered air, technicians
>in special suits, etc. I don't know whether their cover glasses are
>manufactured in the same fashion today.
>
> Larry Barnickel, an early Richard-Allan salesman, told me that one of the
>tricks of the trade years ago was for a salesman to go into a lab, spot a
>competitor's cover glass, pick up an ounce AFTER WETTING HIS THUMB AND
>FOREFINGER, allowing the moisture to wick between the cover glasses to
>cement them together, and then throw the mass on the countertop exclaiming
>how dirty they were!
>
>Gary W. Gill
>
>-----Original Message-----
>From: MacDonald, Jennifer [mailto:jmacdonald@sach.org]
>Sent: July 26, 1999 10:47 AM
>To: histonet@Pathology.swmed.edu; 'Gayle Callis'
>Subject: RE: Inquiry on clean coverslips needed
>
>
>A few years ago I was told that fine glass dust is used to keep the
>coverglass from sticking to each other. This was for automatic
>coverslipping instruments.
>
>
>
>
>
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