HG/T 4360-2012 in English

本标准规定了黑白光学声音底片和高反差正片的感光度的测定方法及其技术条件。
本标准适用于黑白光学声音底片和高反差正片的感光度测定。此类黑白光学声音底片胶片主要用于记录音频信号。此类黑白高反差正片胶片主要用于拍摄字幕或用胶片记录仪输出黑白字幕底片（黑白字幕翻正），也可以把黑白字幕底片制作成黑白字幕翻正，并与彩色画面翻正二次感光制作彩色画面翻底。

Scope

This standard specifies the measurement method and technical conditions for the sensitivity of black and white optical sound films and high-contrast positive films. This standard is applicable to the sensitivity measurement of black and white optical sound films and high-contrast positive films. This type of black and white optical sound negative film is primarily used for recording audio signals. This type of black-and-white high-contrast positive film is mainly used for subtitle shooting or using a film recorder to output black-and-white subtitle negatives (black-and-white subtitles correction). The black-and-white subtitle negatives can also be made into black-and-white subtitles corrections, and combined with color picture corrections for secondary photosensitization production. The color screen is flipped to the bottom.