The differences between CI flexo (Central Drum Flexographic Printing) and rotogravure (Gravure Printing) can be analyzed from the following aspects:
Printing Technology
CI Flexo: Utilizes flexible printing plates and fast-drying inks, with the printing image being transferred from the flexible plate to the substrate through a rubber roller. The printing pressure is relatively low, and the printing process is relatively gentle on the substrate.
Rotogravure: Uses engraved printing plates with ink-holding cells to transfer ink to the substrate. The printing pressure is relatively high, and the ink is transferred to the substrate through direct contact between the engraved plate and the substrate.
Printing Quality
CI Flexo: Generally achieves high-quality printing with sharp images and clear text. The resolution and color vibrancy may vary depending on the quality of the printing plates and inks used.
Rotogravure: Known for its exceptional printing quality, often used for high-end printing needs such as magazines, packaging, and promotional materials. It can produce fine details, smooth transitions, and vibrant colors.
Substrate Compatibility
CI Flexo: Suitable for printing on a wide range of substrates, including paper, plastic film, metal foil, and non-woven fabrics. The flexibility of the printing plates allows for printing on curved or uneven surfaces.
Rotogravure: Typically used for printing on plastic films, such as OPP, and is the main printing equipment for woven bags and color films. It can also be used for the multi-color printing of web paper and other plastic films.
Production Efficiency
CI Flexo: Offers high production speeds and can be easily automated, making it suitable for large-scale production runs. The use of servo motors and other advanced control systems ensures precise control of the printing process.
Rotogravure: Generally achieves slower production speeds compared to CI flexo, but it still offers a significant advantage in terms of printing quality and substrate compatibility.
Cost Considerations
CI Flexo: Generally has lower setup costs and shorter setup times compared to rotogravure. The printing plates are easier and faster to produce, and the machine setup is relatively straightforward.
Rotogravure: Typically has higher setup costs and longer setup times due to the complexity of the engraved printing plates. However, the high printing quality and efficiency in large-scale production can offset these costs over time.
Environmental Impact
CI Flexo: Often uses water-based inks, which are more environmentally friendly compared to traditional solvent-based inks. The printing process also generates less waste and emissions.
Rotogravure: May use solvent-based inks, which can have a negative impact on the environment. However, advancements in ink technology have led to the development of more environmentally friendly options for rotogravure printing.
