Treatment effect of detection: tape jie method: use adhesive tape to paste in the printing film, pressing, with fingers fit closely to that of the film, the film slowly lifted back, watching ink adhesive tape stick up.
If ink detachment rate of less than 1%, the process can be thought of good quality;
Ink detachment rate between 1 ~ 10%, the process can be thought of good quality;
Ink detachment rate between 1 ~ 10%, can think processing poor quality;
Ink detachment rate is more than plus or minus 1%, processing quality is poor, need to deal with.
Ethylene glycol ethyl ether (applanation tonometry method to detect the critical surface:
Surface tension, 30 mn/m)
And formamide (
Surface tension of 57 mn/m)
Mix, 30 - surface tension can be obtained
A series of test fluid 57 mn/m.
Advance three out of the thin film surface tension value, then coated on the surface tension value of the same test fluid, every time the coating area about 40 x + / - 5 was, coated in 0.
5 s to finish.
If the coating liquid membrane could keep more than Zs don't burst, with a high surface tension test fluid testing;
If liquid membrane within 2 s broken into many small droplets, the switching surface tension is less than 36 mn/m, processing quality is bad, need to deal with.