'Simple staining technique' presentation slideshows

Cite the primary purpose of each of the following reagents. Primary stain Mordant Decolorizer

Cite the primary purpose of each of the following reagents. Primary stain Mordant Decolorizer Counterstain. Why is it essential that the primary stain and the counterstain be of contrasting colors? Which is the most crucial step in the performance of the Gram staining procedures? Explain.

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