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电影拷贝的声带如果银粒密度过低,在放映还音过程中音质和音量都会受到很大损失,甚至造成影片报废。这种情况下,需要增加声带银粒密度进行挽救。声带加厚是在原有的银象基础上进行的,只能及于银粒存在之处。彩色拷贝的声带是由染料和银粒组成的,而画面则完全是由染料组成的,在声带加厚过程中不能使银粒附在画面上,否则就会影响画面质量。过去一些资料介绍的加厚法不适于彩色拷贝,尽管硝酸银加厚法可以采用,但因其加工时间长、次数多,不适应大批量的机器加厚。我们经过数百次试验,总结出了下面的加厚彩色拷贝
Film copy of the vocal cords If the silver density is too low, the sound quality and volume in the projection process will be a great loss, or even scrapped the movie. In this case, you need to increase the vocal cord silver density to save. Vocal cord thickened is based on the original silver elephant, only in the presence of silver particles. The color-coded vocal cords are composed of dye and silver particles, while the picture is entirely composed of dyes, silver particles can not be attached to the picture in the vocal cords thickening process, otherwise it will affect the picture quality. The thickening method introduced in the past some information is not suitable for color copy, although silver nitrate thickening method can be used, but because of its processing time is long, the number of times, not suitable for large quantities of machine thickening. After hundreds of trials, we summed up the following thick color copy