论文部分内容阅读
由明胶或聚乙烯醇和重铬酸盐所制成的感光胶,具有原料易得和价廉以及用水即可显影的特点,故被广泛应用于量具刻线、文字的光刻技术中。但由于暗反应较强,抗蚀性较差,所以在感光后的腐蚀或镀黑铬工序中,容易产生胶层被击穿而使产品报废;加上感光胶的坚膜热处理工艺必须控制温度在200℃～210℃之间,且需恒温4小配左右,故势必影响量具测量面的硬度下降,从而会使硬度达不到标准要求。我厂研制的将感光胶的热处理坚膜工艺改为用铬酐水溶
The photosensitive adhesive made of gelatin or polyvinyl alcohol and dichromate has the characteristics of easy availability and low cost of raw materials and water can be developed. Therefore, it is widely used in lithography and engraving of photogrammetry. However, due to strong dark reaction, poor corrosion resistance, so in the photosensitive etching or black chrome plating process, prone to breakdown of the plastic layer so that the product scrapped; plus photosensitive plastic film heat treatment process must control the temperature Between 200 ℃ ~ 210 ℃, and the need for constant temperature around 4 small, it will inevitably affect the hardness measuring measuring surface decreased, so that the hardness will not meet the standard requirements. I developed the factory will be photosensitive plastic heat treatment of the film to use chromic anhydride water soluble