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我们对美国柯达绒面2~#放大纸、西德阿克发绒面2~#放大纸、日本三菱绒面放大纸、捷克FM厚光2~#放大纸和国产公元绒面2~#、绸纹2~#放大纸进行了照相性能对比试验。五国六种2~#放大纸的正常纸和人工老化四天(50℃、相对湿度90％)的纸用正常显影时间(3分钟)及不同显影时间(2、3、4分钟)显影,并测定各种纸的相对感光度、反差系数、最高密度和耐冲性。使用风光牌CGG感光仪(加1.2灰片),光源色温2859°K。光楔:中性灰色级谱各相邻级的光学密度差为0.10。试片在20℃和相对湿度为60±10％的条件下稳定,然后距感光仪1米曝光1秒。感光仪工作电压为
We are the United States Kodak Suede 2 ~ # magnifying paper, West Germany Akko hair 2 ~ # magnifying paper, Japan’s Mitsubishi Suede magnifying paper, Czech FM thick light 2 ~ # magnifying paper and domestic AD 2 ~ Brocade 2 ~ # enlarged paper contrast test of photographic performance. Five normal paper from 2 ~ # enlargement paper and artificial paper for 4 days (50 ℃, 90% relative humidity) were developed with normal development time (3 minutes) and different development times (2, 3, 4 minutes) And determine the relative sensitivity of various paper, contrast coefficient, the highest density and impact resistance. Use CGG photoreceptor (plus 1.2 gray tablets), light source color temperature 2859 ° K. Optical Wedge: The optical density difference between adjacent classes of the neutral gray level spectrum is 0.10. The test piece is stable at 20 ° C and a relative humidity of 60 ± 10% and is then exposed for 1 second at 1 meter from the photometer. Photometer working voltage is