Operating Environment Requirements for Water-based Industrial Paint

Environment requirements: not necessarily constant temperature/humidity; usable at temperature >=10 C and humidity <=80(±5)%, though lower temperature or higher humidity slows drying and vice versa; constant conditions are ideal but not mandatory. A constant-T/R workshop is hard to achieve: painting emits much water, the water-curtain booth releases water, and the spray booth is not sealed (air moves to exhaust overspray), so constant conditions need heavy energy and cost. Why do some water-based paints require no ventilation? Usually poor product performance with strict film formation - ventilation makes the surface dry too fast, causing 'dry-outside-wet-inside' and blushing/cracking. Do single- and two-component have the same environment needs? Basically yes; single-component is more tolerant as it cures by reaction, two-component by self-crosslinking. Does ventilation help? Yes, air flow removes film moisture and aids drying. Is drying speed proportional to high temperature/low humidity? Roughly in early stages, but later the environment matters less. In low-temperature/high-humidity conditions, assist with warm air supply and dehumidification. When humidity exceeds 85%, beyond lowering humidity also note: high humidity mainly slows film drying (boost warm air), fresh coating easily loses gloss (improve drying), and spraying easily causes crawling/cratering (lower substrate surface humidity).