[Histonet] formalin precipitate/Iron artifact

From:Saundra Johnson

I am having a problem with needle core liver Bx.  The iron stains has a
funny blue artifact staining around the peripheral.  Bone marrows and other
tissues with Iron stains do no exhibit this.  We recently started recycling
our zink formalin with Creative Waste Managment's filitering system but make
the correct adjustments as instructed. Additionally, there is a slight
precipate left in the retort chamber at the end of processing,even after the
clean cycle. We have a 50% alcohol after the formalin and then go to 95%.
Any suggestions with these two problems and are they related to recycling of

Saundra Johnson
Histology-IHC Supervisor
Sarasota Pathology

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