Process
- exposing imagewise a photopolymerizable element to actinic radiation emitting a wavelength in the range of 365 nm.
- removing the unexposed or unpolymerized areas of the plate, generally through the use of a solvent.
- drying the resulting plate.
The photopolymerized element can then be detackified by exposing the element to ultraviolet radiation emitting a wavelength in the range of 254 nm. To ensure final plate hardening and photopolymerization, the printing element can be further post-exposed to radiation emitting at wavelengths in the range of 365 nm.
Current platemaking processes utilize various sources of radiation for developing relief images and maximizing plate hardening. For example, actinic radiation from a variety of sources can be used, including commercial ultraviolet fluorescent tubes, medium, high, and low pressure mercury vapor lamps, argon glow lamps, photographic flood lamps, pulsed xenon lamps, carbon arc lamps, light-emitting diodes, etc.
Read more about this topic: Photopolymer
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