Which hematoxylin is most frequently used as a progressive stain?

• A. Mayer Hematoxylin
• B. Harris Hematoxylin
• C. Ehrlich Hematoxylin
• D. Gill Hematoxylin

Answer: (A)

Progressive staining relies on a hematoxylin that develops color gradually, so you can watch and stop when nuclei reach the desired intensity without using a differentiation step. Mayer hematoxylin is best for this approach because its staining power is mild and accumulates slowly, giving crisp, uniform nuclear blue without the risk of over-staining. It’s widely used in routine histology for progressive staining for that reason. Other hematoxylins are more commonly tied to regressive methods or require differentiation steps to control excess stain, which makes them less ideal when you want a true progressive approach.