Low temperature in winter is an external factor for thickening of ink. Under the influence of temperature, the thick change of the ink (original ink) is a physical phenomenon, but the change is the form, not the essence (the basic performance of the ink).
The ink is too thick and the viscosity is large, but it is best not to adjust the viscosity with thinner or ink. Because when the user needs to adjust the ink, the total amount of various additives that the original ink produced by the ink manufacturer can contain is limited. If it exceeds the limit, even if it can be used, it will weaken the basic performance of the ink and affect the printing. quality. In addition, the viscosity of the ink is related to the consistency, which refers to its properties rather than its phenomena. In practice, it is often the case that the ink has a thick consistency, but the viscosity is small, and its fluidity is still large. Therefore, inks with high consistency do not necessarily have high viscosity, and inks with high viscosity do not necessarily have high consistency.
The thickening of ink caused by temperature can be solved by the following methods:
(1) Place the original ink on the radiator or next to the heater, and let it slowly warm up and gradually return to its original state.
(2) For emergency use, use boiling water for external heating. The specific method is to pour boiling water into the basin, and then put the original barrel (box) ink in the water, but to prevent water vapor from immersing, when the water temperature drops to about 27 ℃ Take it out, open the lid and mix well to use. It is advisable to keep the temperature in the printing workshop at around 27 ° C.
At normal temperature, the ink also has a thick phenomenon, because the consistency of the ink reflects the rheological characteristics of the ink to a certain extent. If it is not due to the thickening caused by external factors, it can be summarized as the following two reasons: one is caused by the strong thixotropy in the original structure of the original ink, but it can still be used after being restored to its original state by stirring; the second is the expired ink or Deteriorated ink due to improper storage cannot be used.
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