11. Forme is saved undeserved got strong illumination is shot, have minim exposure appearance;
Processing technique: Change forme or in low imprint of the quantity imprint in tasting, use;
12. The over development when plate making;
Processing technique: Plate making Shi Yinggen comes according to volume of developer solution circumstance and forme speed correct develop, because develop is undeserved,cause colophony film to decrease thin should change forme;
13. Mackintosh ageing;
Processing technique: Change mackintosh;