Substrate cooling wraps heat-sensitive material around a chill roller as it passes under the UV lamphead.

Substrate cooling on GEW UV curing systems

The curing of ink on unsupported heat-sensitive materials can result in web distortion, particularly where heavy, dark areas of ink are being applied. By wrapping the heat-sensitive material around a water cooled roller as it passes under the UV lamp any heat build-up or web distortion are eliminated.  If there is no space for a chilled roller on the machine, a water cooled heatsink can be fitted beneath the lamphead in place of the standard aircooled heatsink.