| 摘要 |
<p>An X-ray sensitive composition including one or several photopolymerizable monomer or photocrosslinkable polymer systems and thermochromic substances which can be used in a dry X-ray reproduction process. The process is based on the different dielectric constants and dielectric losses exhibited by a monomer and the corresponding polymer or a polymer and the crosslinked polymer and the reaction of certain thermochromic substances which exhibits a specific threshold temperature above which these substances change from a colorless form to a color stable form. The X-ray sensitive element (5) is exposed according to a pattern of X-ray with spatial modulation providing an X-ray image (2) to form a latent image of polymerized or crosslinked zones and unpolymerized or non crosslinked zones. Exposed elements (8) are developed by passing through a high frequency electrical field which raises the temperature of the polymerized or crosslinked zones by dielectric heating to above the color threshold temperature of the thermochromic substance. An apparatus for carrying out the process is also described.</p> |
