According to this principle, carryonexperiment again and again, and perfect the course of test entirely, in order to make the method more simple, convenient and more accurate.
并且根据这一原理不断地进行实验，逐步完善整个测试过程，做到既简单方便又快速准确。
2
Exposure energy will change with different CCL and the thickness of ink, so we must carryonexperiment to confirm under-cut degree, exposure ruler limits 7-9 grade remnant film.