How to judge the quality of digital printing ink?
The specifications for judging digital printing inks include:
1.Environmental protection function
Because digital printing products touch the skin, many are also used for export, and the demand for environmental protection functions is high. Therefore, it is necessary for digital printing ink to be water base ink.
2.Color fastness
Color fastness includes washing fastness, dry rubbing fastness, soaping fastness, etc. Color fastness is also an important specification for measuring printing effect (ie, does not fade), usually, the product printed with excellent printing ink, Color fastness is 3-4.
3.Fluency
The ink should be nano-scaled, the impurities in the ink are less, the molecular weight of the ink is small, and the corresponding physical and chemical parameters are adjusted according to the printing machine, so as to ensure that the printing is printed successively for a long time. Fluency is the fundamental quality assurance of the ink, and the lack of fluency means that the ink will be broken during the printing process, which will affect the final product.
4.Color saturation
Whether the color of the printed products produced is gorgeous, and the color that can be expressed by the Buddha even beyond the traditional printing is also an important norm for measuring ink.
5.Storage stability
Whether the ink is suitable for long-term storage, whether chemical or physical repercussions will occur during the registration process, resulting in poor ink function.
6.Batch differences
Whether the ink supplier can supply long-term, stable, consistent quality inks will also affect the quality of the ink.
