In a Hematoxylin and Eosin stain, pale nuclear staining occurs when hematoxylin is too light. Which action would best address this problem?

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Multiple Choice

In a Hematoxylin and Eosin stain, pale nuclear staining occurs when hematoxylin is too light. Which action would best address this problem?

Nuclear color in H&E depends on how much hematoxylin binds to chromatin. If the nuclei look pale, the fix is to give more time for hematoxylin to penetrate and bind, so extending the staining time allows more dye to deposit in the nuclei and deepens the color. Differentiation step is about removing excess stain; shortening it would leave more stain, but that’s not the direct solution when the issue is under-staining. Shortening the overall staining time would likely make the pale nuclei even lighter, and changing to a different protocol is an unnecessary broad change for this specific problem.

Nuclear color in H&E depends on how much hematoxylin binds to chromatin. If the nuclei look pale, the fix is to give more time for hematoxylin to penetrate and bind, so extending the staining time allows more dye to deposit in the nuclei and deepens the color. Differentiation step is about removing excess stain; shortening it would leave more stain, but that’s not the direct solution when the issue is under-staining. Shortening the overall staining time would likely make the pale nuclei even lighter, and changing to a different protocol is an unnecessary broad change for this specific problem.

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