Patent ID: 6975430

Claim:
An ink supply amount adjusting method for a printing press having an ink fountain for storing an ink, an ink fountain roller to which said ink is supplied from said ink fountain, a plurality of ink fountain keys aligned in an axial direction of said ink fountain roller to adjust an amount of ink to be supplied from said ink fountain to said ink fountain roller, and an ink roller group for supplying said ink to a plate in an amount adjusted in accordance with a feed rate of said ink fountain roller, comprising the steps of obtaining reference opening amounts of said ink fountain keys in accordance with image area ratios of respective areas, corresponding to said ink fountain keys, of said plate by following a preset separate conversion curve of a respective ink color, of the relationship between an image area ratio and opening amounts of said ink fountain keys, and uniformly correcting the obtained reference opening amounts of said ink fountain keys with preset correction values, thereby obtaining set values of the opening amounts of said ink fountain keys.