Cap basically with PP and PE materials, selection of ink must match the type of substrates.Should be paid attention to when selecting ink, mainly the following two points.In the plastic cap in the pad printing, the choice of the ink is very important.If you must use the screen printing UV ink, should add a certain amount of gel agent.Although solvent screen printing ink can be used in the pad printing, but the effect is not as good as special pad printing ink.If you need to use UV ink, more should not choose screen printing UV ink, because the metastatic screen printing UV ink is poor.
(1) some ink hardener is added to make the adhesion effect was improved, but increased the difficulty, so unless customers have special requirements, otherwise the proposal had better not use this method.
(2) screen printing ink with good flowing property, and pad printing ink has a better glue sex;Screen printing ink drying speed is relatively slow, pad printing ink dry faster.Had better choose pad printing ink instead of screen printing ink.