Hardcover book printing quality inspection
① Separate editions, especially if foreign-funded factories print multiple editions of the same book, without mixing editions, pay attention to graphics, text, logos, etc.
②The front and back printing has no misprinting, and the front and back printing is aligned, the overprinting is accurate, and the error is ≤0.2mm.
③Printing hue is completely in line with the color draft provided by the customer? Using German R410 hue density meter, the main picture color difference is within ±3%.
④ Printed pictures, clipped pictures and clipped colors on the front and back.
⑤The characters and patterns are clear, and the gloss layering is strong.
⑥The dots are full, 5% of the fine nets are not lost, the larger dots are smooth and clean, and the dot increase value is ≤10%.
⑦No ink bars, water bars, ink skins, collapsed characters, paste plates, etc.
⑧No smearing, focus, ghosting, plate-off, water splashing, scratching, flying ink, deinking, etc.
⑨There is no extra corner film marks, and the layout is clean, no stains, no powder marks, etc.