Which action specifically helps minimize dwell time in the spray zone when preventing Film Cracking Type 2?

• A. Reduce Processing Temperatures to Minimize Core Thermal Expansion
• B. Increase Pan Speed to Minimize Dwell Time in Spray Zone
• C. Use High Solids Coating Systems to Reduce Moisture Burden on Drying
• D. Improve Drying to Offset Overwetting

Answer: (B)

Reducing dwell time in the spray zone comes from moving the coating through that zone more quickly. Increasing the pan speed accomplishes this directly, so each portion of coating spends less time exposed to the spray and the conditions there. Less residence time means reduced solvent evaporation gradients and moisture uptake in the thin film, which lowers the risk of Film Cracking Type 2 that can arise from those stresses. While the other actions affect drying behavior or moisture handling later in the process, they don’t specifically shorten how long the coating stays in the spray zone, making increased pan speed the most effective choice for this issue.