Meigne J M, Roche A, Doyon D
J Radiol Electrol Med Nucl. 1977 Dec;58(12):843-4.
By making use of the film of the substractive screen in contact printing, it is possible to reverse the films into negatives, and to obtain in this manner excellent slides at low cost.
通过在接触式印相时使用减光屏胶片，可以将胶片反转成负片，并以这种方式低成本获得优质幻灯片。
