What temperature is typically used for forced drying in a conventional downdraft spray booth?

In a conventional downdraft spray booth, the typical temperature range for forced drying is between 150 to 170°F. This temperature is optimal for ensuring that the paint dries effectively without compromising the quality of the finish. At these temperatures, the drying process is accelerated, allowing the solvents in the paint to evaporate efficiently while helping to achieve a smooth and durable surface.

Higher temperatures, such as those in the ranges of 180 to 200°F or 220 to 240°F, may cause issues like overheating the substrate, which could lead to warping, adverse chemical reactions, or degraded paint adhesion. On the lower end, temperatures around 100 to 120°F may not provide sufficient energy to promote rapid drying, potentially leading to issues like dust contamination or longer wait times before subsequent coats can be applied. Thus, the 150 to 170°F range provides an effective balance for optimal drying conditions in a conventional downdraft spray booth.