We had the same problem with the mesh cassettes.

> ----------
> From: 	Jennifer Saunders[SMTP:fayerae@digisys.net]
> Sent: 	Tuesday, March 16, 1999 11:00 PM
> To: 	Alan Siwel
> Cc: 	WAYNE HOLLAND; histonet@Pathology.swmed.edu
> Subject: 	Re: Histoscreen cassettes
> 
> The Histoscreen cassette can be safely used for any small bx's. The
> problem we had was that the paraffin would not flow freely though the
> screen because the weave of the screen was so small. Of course this is
> needed for the safety of the small bx's like colon, liver, and bronch's.
> But the trade off wasn't worth the air bubbles that were the problem
> during embedding.
> 
> Jennifer
> 
> Alan Siwel wrote:
> 
> > How small are the smallest pieces of tissue that can be placed into
> > these cassettes? Are they only for skins and cx cone bx's? Won't they
> > get lost?
> 
> 
> 
>