本帖最后由 清泥 于 2009-3-26 22:55 编辑
Trying to adjust to the realities of working with UV screen-printing inks? Use this Q&A discussion to clear up any misunderstanding about the inks, the curing process, and other aspects of UV technology.
1、What is the relationship between the watts per inch setting on the curing-unit lamp and the watts or milliwatts per square centimeter reading that I get from a radiometer?
Watts per inch is a unit of power (wattage) for the lamp in the curing unit. This is based on Ohm’s Law: volts x amps = watts. Watts or milliwatts per square centimeter represent the amount of peak irradiance (UV energy) per unit area measured by the radiometer as it passes underneath the lamp (Figure 1).
Peak irradiance is determined, among other factors, by the wattage of the lamp. Peak irradiance is measured in watts because irradiance represents UV energy or power. Lamp power also is measured in watts because this represents the electrical energy the lamp consumes. In addition to the amount of electricity the curing unit receives, other factors affecting peak irradiance are the condition and geometry of the reflector, age of the lamp, and distance from the lamp to the curing surface. |