In Verhoeff's Van Gieson staining, overexposure to the reagents is likely to affect elastin fibres by making them which color?

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Multiple Choice

In Verhoeff's Van Gieson staining, overexposure to the reagents is likely to affect elastin fibres by making them which color?

Explanation:
Elastin fibers in this staining are targeted by the Verhoeff component to appear black. If the reagents are overexposed, the black pigment fades or bleaches, so the elastin no longer looks black. In that case, the fibers will appear not black, i.e., lighter and less contrasting against the counterstain. The staining is designed so elastin is black under proper conditions, with collagen and other tissue elements taking on other colors, so overexposure disrupts that specific black appearance.

Elastin fibers in this staining are targeted by the Verhoeff component to appear black. If the reagents are overexposed, the black pigment fades or bleaches, so the elastin no longer looks black. In that case, the fibers will appear not black, i.e., lighter and less contrasting against the counterstain. The staining is designed so elastin is black under proper conditions, with collagen and other tissue elements taking on other colors, so overexposure disrupts that specific black appearance.

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