These can be used to judge the risks a blanket or roller wash poses to safety, health, and the environment. Method 24 subjects a 1-2 mm thick film of the blanket wash to 110 o C for 1 hour in an oven. The lower the VOC content the better. Vapor pressure provides an indication of how quickly VOCs will evaporate. Low vapor pressure solvents evaporate more slowly than high vapor pressure solvents.
Vapor pressure increases with temperature.
The lower the vapor pressure the better. The flashpoint is the temperature at which a spark above the liquid would ignite a flame. The higher the flash point the safer the wash.