The problem could have been helped by which action?

• A. Soaking the faces block
• B. Grinding the blade
• C. Refilming the block
• D. Cooling the bath

Answer: (A)

A smooth, uniform block face is essential for producing even, artifact-free sections. Soaking the face of a paraffin block softens the surface wax just enough to create a true, flat plane for the microtome knife. This reduces resistance and the formation of ridges or tearing in the ribbons, leading to cleaner, consistent sections. If the block surface is dry or crusty, the blade tends to grab and produce irregular cuts; a brief soak helps reestablish a uniform surface so the blade can cut smoothly. The other actions address blade condition, re-embedding, or bath temperature, which do not directly fix the surface condition affecting section quality.