With the spraying process of the alternative products -- composite type of offset printing ink additives in the practical application, alternative injection process has made some achievements in and in the entire printing process and overall (comprehensive) printing quality and printing process on to let users satisfactory effect. But in the accumulation of ink sometimes there will be some problems on the blanket: 

(1) printing to about 4000, began to appear in the phenomenon of ink, but the ink system and printing plates are not abnormal phenomenon. 

(2) printing to 5000 or more, the occurrence of the ink, other aspects of the normal. 

(3) printing 9000, everything is normal, there is no ink phenomenon. 

Cause analysis: the main reasons for the pile of ink are: raw and auxiliary materials, environmental conditions and other factors. Ink piling phenomenon has certain rules, when a problem occurs in, if you carefully observe the development trend and progress of change, involving the place and print quality is impaired by degree, you can through the phenomena were determined by the following conclusions. 

1. Along the clockwise direction of the heap ink: pile of ink roll, plate reactor, reactor blanket, from the top to the bottom of the heap ink, known as the "three piles" phenomenon. It is mainly caused by two individual physical properties, ink drying too fast or excessive dryness due to oil (especially red dryness oil), which will not only cause ink crust, but also will lead to ink texture become coarse; second, ink pigment particles are coarse and heavy texture, such as. 

2. Inverse clockwise heap ink: "three piles" phenomenon began to blanket reactor ink phenomenon, mainly by the performance of the two substances each other caused by the correlation, one is paper surface strength, ink viscosity and viscosity. Of course, if the ink printing viscosity larger value, so different. In the course of this problem, the surface strength of paper and ink larger viscosity, viscosity compared to the decisive factor is the surface strength of paper. 

Because ink emulsification caused by the pile of ink, the first to be affected is plate and ink roller and to two directions to the ink fountain, to the blanket and then transfer to the paper. Ink emulsification slight degree are harmless, severe cases will produce under pile blanket and piled roller phenomenon, if ink emulsification is too serious will damage the ink body structure, resulting in to print. However, it is easy to be ignored is not only a slight and serious progressive ink emulsion phenomenon. No obvious signs of change, until the water content becomes large and savings to a certain extent, will make the ink little by little accumulation in the blanket. At the same time and then the rollers gradually transfer to the transfer of ink system, the phenomenon is roller holdout slow thickening, but were not as to influence ink transfer. At this point, if you do not pay attention to adjust the ink balance, the root causes of their mistakes, improper measures, it is prone to accidents. 

Recommendation: (1) to remove the residual dust attached to the various parts of the printing machine. If you are using non dusting ink additives should be thoroughly cleaned up. 

(2) regular replacement of fountain solution, at the same time completely remove the sediment below the water tank, washing tank. Reverse development in the printing process is not only the "three" phenomenon in the unique, fountain solution also has this phenomenon, but has not caused the attention of people. When encountered problems, the following methods can be used to detect the fountain solution: 1. The fountain solution in the tank after 4 hours, the fountain solution will be divided into the upper, middle and lower three. II to muddy the water in the fountain solution, remove the 150ml poured into the capacity of 200ml glass, standing for 4 hours after, to the upper and middle water poured out (note don't stir the bottom sediments), slowly pour out of the lower part of the water, the left in the bottom of the precipitates are taken out and put in a glass sheet spread out, dry Bacheng dry, with a microscope observed. If there is no microscope, can also be used 30 times the magnifying glass carefully observed, you can find the reason. 

Ink problem: low winter temperature is the external factors of ink thickening. 

Under the influence of temperature, ink (ink) is a physical phenomenon, but the change is not the essence of the nature (the basic properties of ink). 

The ink is too thick, the viscosity is large, but it is best not to use thinner or inking oil to adjust its viscosity. Because when users need the deployment of ink, ink manufacturers produce ink can hold all kinds of additives amount is limited, beyond the limit, even if you can use, also weakened the basic performance of ink, influence printing quality. In addition, the ink viscosity and consistency of the relationship, here is the nature of the property, not its phenomenon. In practice, this is often the case, the ink consistency is large, but the viscosity is small, the flow rate is still large. So, the consistency of the ink is not necessarily large viscosity, large ink viscosity is not necessarily a large degree of consistency. 

Ink thickening caused by temperature, you can use the following ways to solve: 

(1) the original ink on the side radiator or heating, the slow heating gradually restored to the original. 

(2) emergency can use water for external heating, the specific method is put water into the basin, then the original barrel (box) ink can be placed in the water, but to prevent water vapor immersion, until the temperature dropped to about 27 degrees Celsius when removed, opening the cover uniform mixing can be used. The temperature of the printing shop to keep at about 27 degrees Celsius is appropriate. 

Under the normal temperature ink also has thick phenomenon, because the ink thick degree in a certain extent, reflect the rheological properties of ink. If not due to external factors caused by the thickening phenomenon, induction for the following two reasons: is caused by the original Monei in the structure of strong thixotropy, but after stirring restitution after, still in use; the second is expired ink or caused by improper storage of metamorphic ink and cannot be used.