The usual problem and methods for pearl ink?

1.Poor pearl luster effect or no pearl luster effect

(1) Check the mesh point whether jammed or not,or needs washing the mesh point.Whether the mesh point of printing plate is too shallow or not,then can’t reach the expecting effect.

(2) Check the viscosity of pearl ink whether suitable with speed of a lathe cooperation.

(3) Check the angle of scraper whether too big or the pressure too high or not.

(4) Check the distance between scraper and pressure roller too long and bring dry plate phenomenon.

     （5）You may have added the strong hiding power of pigment and filling.

 （6）The dosage of the pearl pigment is overabundance or too little.

 （7）Check the network line and carve depth of the printing cylinder is weather match with the particle size of the pearl pigment. There are products materials in our company, suitable for asking for and reading.

 （8） The Printing ink transparency is weak or the membrane is not very well, and the surface luster is not enough. We advise you use better printing ink instead.

 （9）you should check the pearl pigment weather separate enough, the group gathered pearl pigment will influences the pearly-luster result.

B. the surface of the leatheroid appear needle hole or little bubble.

2.Adhibit back,adhibit junction,adhibit link 

（1）The ink don’t dry well.We should increase the dry equipment,quicken printing speed,use thinner that almost be dry.

（2）he block is too deep and accumulated layer too thick.

（3）The pressure is too big, wrapup tension too big or crimp length too big.

（4）The Pellicle is affected with damp.We should dry the pellicle firstly and then print.

（5）The pellicle corona dealing with improperly and can’t reach the dealing requirement.

3.Pearl powder printing unequally

（1）Poor accurancy of glue roller.The poor contact between glue roller and string ink roller or the glue roller too hard and smooth which bring printing handspike bottom and cause unequal dyeing.

（2）The ink viscosity is too high. When the ink viscosity is too high, it is not easy to spread coating and transfer to the plate layer, when the press printing is finished, it will cause unequal phenomenon.

（3）The pressure of printing pressure roller is unequal. We should make the two sides of pressure roller same.

（4）Electrostatic phenomenon. We should get rid off the electrostatic in time. Generally we adopt connect the earth and place.

（5）Check the pearl powder whether deposited or not .We should enforce the milling.

（6）When choose pearl powder, we should choose well the coadaptation between pearl powder and diluent.

4.Have pearl effect but without luster

1.The volatilization speed of thinner is too fast, we should match the thinner with slow speed.

2.Reduce the temperature of oven or cold wind.

3.Quicken up the printing speed.

4.The ink is too sparse. We should increase the ink viscosity.

5.Burnt printing plate, jammed printing plate

1.The ink dry too fast. We should adjust appropriate dry speed.

2.There is impurity added. We should pay attention to the environmental health.

3.Improve the speed of printing machine to reduce the time of drying printing plate.

4.Reduce the distance between scraper and pressure roller.

6.Poor shell power strengh when printing compound

1.Choose the function of pearl ink accurately and make sure the surface printing or inside printing.

2.Choose appropriate glue and thinner well.

3.Control the amount of glue size, temperature, tension and so on when compounds.

4.Command the corona dealing condition of pellicle well!

5.We should choose appropriate diluent and compounding glue that can correspondent if we prepare pearl ink by ourselves.

7.dispersing of pearl pigment

When we confect pearl ink,we should add the peal pigment in the last period.It also means that when others parts have mixed equally,we can add.In this way it can avoid destroy because of exceed shearing.

When we produce,we should wet the pearl pigment fully with a small amount of solvent,then add a small amount of carrier ink and mix equally.Finally put dispersing ink into transparent ink left to make further mixing and dispersion.According to low shearing power and high speed to mix.It needs about 15minutes to make disperse equally.To avoid pigment being destroyed,the mixing machine with high shearing power are not allowed to be used,such as ball mill,stone mill and three roll machine,etc.