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我们一直使用《厦门》牌印相纸印相。为了掌握和熟悉它的特性,每种纸在使用之前,一般都要经过感光测试。这里结合使用当中的一些体会,谈些不成熟的意见,仅供参考。一、测试条件使用印相机曝光,时间固定;使用吉瓦20级,级差为0.15的光楔;显影用D-72显影液,1:2冲淡,容积为3,000毫升,在温度20±0.2℃的条件下,冲洗光楔带;使用美国麦克拜斯RD-519反射密度计测量密度。
We have been using “Xiamen” brand photographic paper printing. In order to master and familiarize with its characteristics, each type of paper is generally subjected to a photographic test before use. Here to use some of the experience, talk about some immature opinions, for reference purposes only. First, the test conditions using a printing machine exposure, fixed time; the use of 20 watts of grade, a difference of 0.15 optical wedge; Development D-72 developer, diluted 1: 2, a volume of 3,000 ml, at a temperature of 20 ± 0.2 ℃ Under conditions, flushing the wedge belt; using the United States McBride RD-519 reflection densitometer to measure the density.