Method for controlling powder device

The invention relates to a method for controlling a powder device in a printing press by means of a computer. For a printing task, the powder amount is set on the powder device according to the stored first characteristic curve, and the powder amount is sprayed on the sheet (3) evenly distributed across the printing width by the powder device. The powder amount is set in consideration of the stored color preset data. The computer can obtain the first surface coverage rate (5) and the second surface coverage rate (6) from the color preset data. 本发明涉及一种用于通过计算机在印刷机中控制粉末设备的方法，对于一印刷任务，在所述粉末设备上根据存储的第一特性曲线设置粉末量并通过所述粉末设备将所述粉末量在印刷宽度上均匀分布地喷洒在页张(3)上。考虑到存储的颜色预设置数据设置所述粉末量。所述计算机可由所述颜色预设置数据求取第一面覆盖率(5)和第二面覆盖率(6)。