The original StatLab best-selling rapid stain for the past 40 years. Three-step procedure for differential staining of blood smears, used extensively in FNA cytology. The entire procedure takes 30 seconds as air dried specimens are fixed in Solution I, then dipped in Solutions II and III. Excellent for FNA cytology, differential staining of blood smears, microbiological organisms, H. pylori, and bone marrow specimens. Versatile and very economical. Components sold separately or as a kit. Can also be used as a special stain for Helicobacter pylori. 1 Gallon of Hema-Diff #3 Thiazine.