We filter Harris Hematoxylin everytime or daily that it is being used.  It
forms a film sheen across the top of container that coats the slides
creating blue spots on the slides if not filtered often.  Other types of
hematoxyling preparations do not have such requirements.  

sharon osborn
DNAX
ScheringPlough Biopharma
Palo Alto, CA




On Behalf Of Diana
McCaig
Sent: Wednesday, June 01, 2005 12:19 PM
To: Histonet (E-mail)
Subject: [Histonet] filtering hematoxylin

How often do you filter commercially prepared Harris Hematoxylin (used
on autostainer)?




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