What is the most common hematoxylin in H&E procedure?

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I have used hrp bound sencondary antibody developed with DAB+H2O2+PBS and i am not getting stain it seems like hematoxylin have stained only?

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Haemotoxylin and Eosin [H&E] weak Eosin stain, how to get rid of the glass cover and which staining step to re-do?

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My HE is fine, hematoxylin itself is in good condition. after DAB staining,there are also clear brown positive cells, but using hematoxylin for counterstaining, it don't get stained. I changed...

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Immunohistochemistry of claudin-4 (or TJ proteins) on fomalin fixed paraffin embedded mouse lungs?

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Aminoddin Domado

The most common hematoxylin in the H&E staining is the alum hematoxylins (Suvarna et al., 2015). Aluminum is used as the mordant, which can be either aluminum potassium sulfate (potash alum) or aluminum ammonium sulfate (ammonium alum). It provides good nuclear staining by staining it red, which is then converted to blue-black after washing with weak alkali solution.