Use of frequency-modulated screening for lightening offset printing surfaces

A printing plate for use in waterless or wet offset printing having a printing surface comprising inkphilic and non-inkphilic areas, said inkphilic area defining the image desired to have ink when printing is effected, wherein at least a part of said inkphilic area is lightened by inclusion of a plurality of small non-inkphilic surfaces thereon and wherein said small non-inkphilic surfaces are randomly distributed small dots of the same small area in said inkphilic area such that when ink is applied to said plate and adheres to the inkphilic area defining the desired image, said ink is prevented from adhering to said small, randomly distributed non-inkphilic surfaces.