Sixth, false overprinting of spot color gold and silver ink
1. Phenomenon: After the gold and silver inks are printed, they can still see spot color ink leaking.
2. Reasons: (1) Thickness of ink layer of gold ink, large amount of ink stored, not easy to dry, high viscosity; (2) large printing pressure, forming ink crowding; (3) small amount of ink transfer, ink layer is not thick enough; (4) ) The fineness of the gold ink is not enough, the quality of the connecting material is not good, the internal quality of the ink is problematic; (5) the surface of the paper is rough; (6) the time interval between the underprinting and the printing of the gold and silver ink is too long; (7) both The surface tension of the ink is quite different, and the upper ink (gold ink) pigment cannot uniformly cover the lower ink layer.
3, the solution: (1) in the appropriate amount of quick-drying solvent in gold ink, special colors are slow-drying agent, if not affect the printing effect, the ink viscosity as much as possible to maintain moderate. Printing large areas of gold, should reduce the speed, increase the ink drying time; (2) adjust the reasonable; (3) In order to enhance the sense of the metal, so that the gold and silver ink printed plump and thick light, real-time gold and silver ink viscosity should be slightly larger , (For example: 60 "/25 °C or so), but the printing dot or thin line should be similar to the ordinary ink viscosity; (4) exchange other suppliers ink; (5) for processing or exchange; (6) time can not be The interval is too long to print when the bottom ink is not dried (7) The corona treatment can be increased, the surface tension value can be increased, the adhesion can be improved, the viscosity of the second color can be reduced, and the spot color ink layout can be hollowed out. Enhanced gold ink adhesion.
1. Phenomenon: After the gold and silver inks are printed, they can still see spot color ink leaking.
2. Reasons: (1) Thickness of ink layer of gold ink, large amount of ink stored, not easy to dry, high viscosity; (2) large printing pressure, forming ink crowding; (3) small amount of ink transfer, ink layer is not thick enough; (4) ) The fineness of the gold ink is not enough, the quality of the connecting material is not good, the internal quality of the ink is problematic; (5) the surface of the paper is rough; (6) the time interval between the underprinting and the printing of the gold and silver ink is too long; (7) both The surface tension of the ink is quite different, and the upper ink (gold ink) pigment cannot uniformly cover the lower ink layer.
3, the solution: (1) in the appropriate amount of quick-drying solvent in gold ink, special colors are slow-drying agent, if not affect the printing effect, the ink viscosity as much as possible to maintain moderate. Printing large areas of gold, should reduce the speed, increase the ink drying time; (2) adjust the reasonable; (3) In order to enhance the sense of the metal, so that the gold and silver ink printed plump and thick light, real-time gold and silver ink viscosity should be slightly larger , (For example: 60 "/25 °C or so), but the printing dot or thin line should be similar to the ordinary ink viscosity; (4) exchange other suppliers ink; (5) for processing or exchange; (6) time can not be The interval is too long to print when the bottom ink is not dried (7) The corona treatment can be increased, the surface tension value can be increased, the adhesion can be improved, the viscosity of the second color can be reduced, and the spot color ink layout can be hollowed out. Enhanced gold ink adhesion.
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