Common Faults in Printing and Solutions (3)

Possible Causes Solution The position of the print head is not correct. The position of the print head is adjusted so that the color of the print head is different. Several colors are printed. Multi-color printing is used. Printed in the same color using the same print head. The hardness of the printing head is different from multi-color printing. The gravitational gravure printing head with the same hardness is used to etch the gravure. Several images on the color plate are not registered. Re-etching to make the gravure ink The dot enlargement of a certain color is larger than that of several other colors. Viscosity to prevent ink from causing dot gains in printed materials. Printed objects fall down (eg plastic bottles) with a jig that supports good performance. Other possible causes Workpiece fixtures are not sufficiently stable to control fixtures. If necessary, replacing a new fixture fixture is not useful. Screw tightening Use a screw to tighten the clamp Some rotating table moves Inaccurately adjusts the table so that the table moves back and forth

Possible Causes Solution The head of the print head is too flat. Change the head of a sharply pointed head The head of the print head has holes and wear bad. For a new print head. Corrosion gravure Re-etch to make a deeper gravure Intaglio etching depth is too shallow The type of gravure material is not properly selected Re-made gravure ink ink too thick Add a little thinner ink Dry fixation At the concave surface of the gravure Diluent cleaning Intaglio printing materials Printed objects contaminated by grease Clean the printed objects with ethanol Other causes The speed of the pad printer is too slow to increase the speed of the pad printer

Possible Causes Solution The pad print head is too soft. For a slightly harder pad. The shape of the pad is not properly selected. To change the shape of a slightly sharper pad The surface of the pad is hard and porous. For a new print head, the etched gravure gravure has a shallow etching depth. If the ink is dried and fixed on the gravure, a deep gravitational deep gravure gravure is etched too deeply. Re-gravure gravure The gravure ink with moderate depth is dried on the print head Add a little blocker or add some thinner to the crust. The ink is too moist on the surface of the printing head. To the point where the ink is added. The faster the diluent is, the faster the printing material is. The printed surface of the printing object is not clean (The surface has grease, release agent, hand sweat and other dirt ) Pre-cleaning printed objects, if the surface is too dirty, it is best to use ethanol to clean, it is recommended to wear gloves during the printing process, other reasons, indoor temperature is too high, indoor temperature is best between 21-25 °C, the moving speed of the printing head is too slow If the ink dries on the surface of the printing head, then the moving speed of the printing head is increased. The moving speed of the printing head is too fast. The ink on the object is in a wet state. More drying time, or using cold/hot air drying