Knowledge about Relief Flexo Polymer Printing
Jul 15, 2026
Knowledge about Relief Flexo Polymer Printing
1. In what scenarios are flexographic printing plates of different thicknesses used?
Thin plates (e.g., 1.14 mm) are suitable for narrow-web label printing; medium-thickness plates (e.g., 1.70 mm) are used for corrugated board pre-printing; and thick plates (e.g., 2.54 mm or greater) are used for flexo printing on heavy paperboard or rough-surfaced materials. The choice of thickness depends primarily on the printing substrate and the press configuration.
2.Do the exposure and washout processes affect the hardness of the flexographic plate?
Yes, they do. Insufficient main exposure time results in inadequate hardness, while excessive washout time can soften the surface. Properly controlling the exposure, washout, and drying times is crucial for achieving the desired final hardness.
3. Which customer segments are the various Flexo CTP models suited for?
Equipment models are typically categorized by maximum plate size and the level of automation:
- Small-format models (e.g., 450×450 mm): Suitable for label printing and small-to-medium-sized flexo printing plants;
- Medium-to-large-format models (e.g., 800×600 mm): Suitable for corrugated pre-printing and carton printing plants;
- Large-format models: Suitable for large packaging groups or specialized high-speed flexo printing facilities or flexo plate making center.
4. Does the exposure time vary depending on the flexo plate thickness?
Yes. The greater the thickness, the thicker the photosensitive resin layer, requiring a longer exposure time for full curing. Specific parameters should be determined based on the plate model and equipment calibration. The exposing time for 2.84mm flexo plate takes about 20min.
