The main topic of this paper discusses how to use transfer function provided by PostScript to compensate for dot gain in the stage of platemaking,and an example of calibrating imagesetter is given.

• 重点讨论桌面出版系统在制版阶段利用postscript语言提供的变换函数功能以补偿网点扩大，并给出了照排机标定的一个实例。