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Slow drying water-based ink blot Cause Remedy

Source: Time:2013-05-04 16:05:04 views:

Printing company printed on the left imprinted by ink, printing ink colorants main raw material for the performance when the ink is not suitable for printing inks print quality is essential merits, causing processa series of failures, seriously affecting the behavior of production and product quality. Zhongshan Polytec printed materials, to remind the press operator must change some properties of the ink to meet the printing needs, but some failure is not only caused by the ink, but also related to other factors, the press operator must carefully analyze properly treatment. In this paper, ink after printing process caused by the failure and treatment are discussed, and hope that we can help.
Blot dry and slow phenomenon and why.
After absorbing blanket transferred to paper from the plate, about 10 hours, the general requirements in the dry, in order to facilitate post-color printing or finished product testing plant, blot dry and slow in the event, which not only can not make the next color overprint, but also easy to make print dirty sticky back. Dry oxidation of the conjunctiva, the paper does not absorb moisture evaporation three factors, we must correctly grasp the operation, prior prevention. Normal imprinting slow drying because of the following aspects:
(1) Paper pH below 6;

(2) the water fountain to the PH value of 3 or less;

(3) Layout, water ink emulsion Melbourne cause severe;

(4) at room temperature is low, more than 75% relative humidity;

(5) The absorbent paper;

(6) ink mixed with Mexican oil viscosity withdraw support materials;

(7) The amount of dry oil too little.
Treatment methods:

     (1) In order to prevent print slow drying, reducing the height of the stacked printed materials, shaking loose stack of paper, semi-ventilation air can penetrate the stack of paper, reduce oxidation conjunctiva time;

     (2) Printed materials needed with the original dry oil overlay graphics board, 70% of the peacekeeping force oil formula, 30% of the dry oil;

     (3) In order to prevent drying of unfavorable factors, plus put the right amount of dry oil, dry oil capacity: in winter than in summer, put, put the same color than the previous one color ink diluted more than undiluted ink discharge.
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