When gold, sulfur and sodium sulfite were employed to serve as chemical sensitizers, a suitable technique must be adopted. Under the same conditions of exposure and development, the sensitivity increased from S=16 DIN to S=25 DIN.

• 当选用金、硫、亚硫酸钠作为化学增感剂时,通过采用合适的工艺方法,在相同的曝光、显影条件下,胶片的感光度从原配方的S=16DIN增加到S=25DIN。