This means that, in order to “wet out” on most plastics, the surface tension has to be reduced considerably in order to achieve good print quality and smooth laydown of ink. Water has a high surface tension, which can print beautiful perfect dots, but also can create mottled/pinholed solids. In other words, they require energy that negates any positive ecological benefits from their use. Unless we print on high absorbency substrates, water inks require significant heat to dry and to leave a cured film on the material. They are comparatively ecofriendly.īut when it comes to printing inks onto films and plastics, water creates problems. Water-based inks are often praised as a green solution for a more sustainable product. Environmental awareness is driving the printing industry to consider other ink systems in order to print more ecological packaging.
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