| 摘要 |
An improved method for preparing relief printing plates by transfer of selected portions of a dry, uncured, heat-sensitive polymer dispersion layer from a donor sheet to a printing plate through fusion under infrared radiation. Infrared-absorbing indicia are deposited on a printing plate base having an affinity for fusion with the polymer dispersion under infrared heat. The printing plate base having indicia thereon is placed in intimate physical contact with the polymer dispersion layer of the donor sheet. By application of infrared energy, portions of the polymer dispersion layer are polymerized and hardened in the desired image and fused to the printing plate base to and through the indicia. The donor sheet with the unfused portions of the polymer dispersion, peels away easily leaving a finished printing plate with the indicia incorporated therein.
|
