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, progressive type. Used with hematoxylin and eosin staining.Our Gold Standard Series Gill's Hematoxylins are available in three strengths. Choose from Gold Standard Series Gill's Hematoxylin #1, #2, or #3 for optimal staining of your Cytology and Histology samples.Gold Standard Gill's #1 is ideal for routine cytology staining. This single strength formulation optimally stains gynecological and non-gynecological specimens.