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.
2. The front and back printing has no misprinting, the front and back printing is aligned, the overprint is accurate, and the error is ≤0.2mm.
3. Printing hue is in full compliance with the color draft provided by the customer? Using German R410 hue density meter, the main picture color difference is within ±3%.
4.The front and back are printed with pictures, clipped pictures and clipped colors.
5.The characters and patterns are clear, and the layered sense of gloss is strong.
6. The 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%.
7. No ink bars, water bars, ink skins, collapsed characters, paste plates, etc.
8. No smearing, focus, ghosting, plate-off, splashing, scratching, flying ink, deinking, etc.
9. There is no extra corner film marks, and the layout is clean, no stains, no powder marks, etc.