| 摘要 |
Using one and the same film and identical developing conditions and other processing requisites, it is possible to obtain a redn. of the reversal film or paper contrast extent from max. down to no contrast at all. This is achieved by illuminating specific, tough photographic reversal material for a shorter or longer part of the total exposure time, using neutral light without a original picture. - The material is then exposed to light with an original picture, developed and processed in the usual way. |
