| 摘要 |
<p>An image is formed by exposing an original to a fluid or semi fluid recording medium contg. a photochromic spirobenzo b pyran dissolved in a solvent of low polarity (10-1 to 10-3 mole/l), thereby modifying both the colour of the photochromic cpds. and the rheological properties of the soln. in the exposed areas, converting these into a solid state, and eliminating the still liquid part of the soln.</p> |
