Printable PE These are preferred in transitioning from PET/PE structures to single-layer PE-PE structures. They are HDPE-based PE films. They can be printed using flexographic and rotogravure printing methods. Optimization of printing parameters is necessary, especially for rotogravure printing. They are suitable for lamination. PE/PE laminated structures require optimization of parameters such as sealing temperature, duration, and packaging speed when used in packaging machines.