The recommended preventive measure for this type of problem involves which action?

• A. Allowing the flotation bath water to stand overnight
• B. Using a new blade entirely
• C. Increasing section thickness
• D. Reducing embedding time

Answer: (A)

When sections don’t float or flatten consistently in the flotation bath, the problem is often tied to residues or films on the bath surface that disturb how the sections lie flat. Letting the flotation bath water stand overnight gives time for oils, wax residues, and other debris to settle out and for any surface film to dissipate. The next day, the water is clearer, and the surface is more uniform, which helps sections float evenly and reduces artifacts like wrinkling or uneven flotation. The other options target different steps—changing the blade affects cutting quality, increasing section thickness changes the tissue geometry, and shortening embedding time impacts infiltration—so they don’t address the flotation bath condition that leads to the described problem.