Polysciences, Inc. Gold Standard Series Hematoxylin and Eosin products offer you the highest quality for routine staining. Strict quality control for all Gold Standard Series Routine Stains ensures lot-to-lot consistency. Stains are packaged in convenient plastic recyclable containers.General purpose nuclear stain, regressive type. Used with hematoxylin and eosin staining.Use Gold Standard Harris Hematoxylin for routine histology and cytology. Similar results can be achieved to those of Gill's Hematoxylin #1, #2 and #3 formulations by varying staining times.