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The quality problems encountered in printing

Color deviation: the reasons may include poor quality of the original manuscript, inaccurate plate making, inconsistent control of book printing conditions, good control of ink color, improper light source of the sample table, etc.

The color is pale, not bright: Reason may be that the poor quality of the manuscript design, color separation, plate burning, false impression too shallow, printing pressure and printing machine aging, smooth white version of the excess liquid, paper rough, through the low.

Text flooding: the reasons may include low density of positive images, high film foggy, too light printing ink, insufficient printing pressure, aging printing press, excessive fountain solution, insufficient ink volume, etc.

Paste version: due to the printing plate image and text part overflow ink, resulting in the book printing on the substrate is not clear, it is a fault of offset printing products.

Dirty plate: due to the printing plate wetting part bag, resulting in the blank part of ink.

Off the plate: flat printing version of the picture and text subtle tone lightened, dot and line area reduced, even lost ink affinity.

Dot gain: the dot area on the substrate is larger than that on the corresponding part of the printing plate.

Ink stacking: ink or other substance deposited on rollers or rubber sheets, forming embossed deposits that affect ink and ink transfer.

Deinking: the phenomenon that metal ink rollers oxidize and repel ink when corroded by moisture.

Ink emulsifying: the phenomenon of ink absorbing wetting fluid during printing or the printing failure caused by excessive absorption of wetting fluid in ink.

Pulping: when printing, the paper fibers, or coatings fall off or are pulled off the paper due to the ink being too sticky or the strength of the papa surface is different.

Printing malfunction: a general term for a phenomenon that affects the normal operation of production or causes quality defects in printed matter during printing.

Overprint error: the error of overprinting in overprinting.

Double image: a double outline of the same color dot, line, or text that appears on a print.

Backside adhesion: the printing ink printed on the substrate, stuck on the back of another sheet, resulting in a smear.

Overprint: pictures and text printed on paper are visible on the back.


Release Date: 03-08-2019 15:45:17 [Go back Menu]

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