Von Ebner's fluid is used specifically for what purpose?

Von Ebner's fluid is specifically used for surface decalcification of tissue blocks. This technique is important in histopathology, particularly when working with mineralized tissues such as bone, where it is necessary to remove calcium before further processing. The decalcification process allows for better penetration of embedding media and improves the tissue's suitability for subsequent sectioning and staining.

The properties of Von Ebner's fluid make it effective for this purpose, as it can selectively dissolve calcium salts without affecting the overall morphology of the tissue. This is critical in ensuring that the histological structure is preserved for accurate diagnosis and analysis.

The other options relate to different processes in tissue preparation and analysis but do not align with the specific function of Von Ebner's fluid in decalcification.