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1. Thin Ink
With ink level 2-3μm usually, comparing to silk-screen printing, the offset printing level is thinner, the stereoscopic is also worse. Corresponds, its printing ink light-solidification is quicker; printing ink consumption is less, not easily causes the plate piece distortion as the contraction of printing ink. It suits specially in DVD printing, for its slight affection to the plate piece smoothness.
2. Good reappearance effects of printing articles and images
The offset printing belongs to indirect switch-printing, i.e. shifting the articles and images from printing plate to the rubber insulation, then again shifting to the printing surface of CD. Therefore, the offset printing mesh point distorts slightly. Different from traditional paper printing, CD offset printing is anhydrous, so its most major characteristic is water-ink balanced not needed. And structure of anhydrous printing plate is comparatively close, and its line number can achieve 175-200 lines/inch. Consequently, the design printed is clear, with strong sense of reality and good color reproducibility. When prints some transition color, its effect is better. It suits for printing character, scenery and so on as the subject, especially for product need multicolor fold printing, the effect are better.
3. Few times to dry
The plate piece of CD is easy warped in printing, especially in the process of printing ink light solidification, as CD printed by Polycarbonate plastic, of which Brittleness is very high. In the process of silk-screen printing, each color must alone dry once; however, the offset printing only need one dryness after four color printing finished. This suits especially for DVD printing, for thickness of DVD equal to 2 pieces of 0.6mm CD fitting. Small common difference of thickness (CD is 200μm and DVD is 1OOμm), higher smoothness and fewer times dryness, all these merits reduces the possibility of plate piece warp.
4. High Costs
The offset printing equipment is comparatively high. When the compact disc offset printing equipment just put into the market, its price approximately for silk-screen printing equipment's 5-6 times Even presently, the cost of one set offset printing equipment equals to 2-3 silk-screen printing equipments. Many professional people favor anhydrous offset printing in CD printing. Even several of them think of it as the tendency. This implication great potential's printing way is esteemed by many related suppliers, and obtained fast development. |
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