However, there is a notable drawback: digital printing ink cannot resist high temperatures. During bag manufacturing, the printed ink tends to cause quality defects such as discoloration at sealed edges or ink sticking between overlapped layers when exposed to heat. This long-standing industry-wide bottleneck has troubled the entire sector for years. To address this issue, KB Packaging has invested heavily in dedicated research. Through process and technological innovation, we have fully resolved the above problems. Our products are no longer constrained by ink discoloration caused by hot pressing.
Major Breakthrough – Quality Comparison
Explanation: No discoloration occurs at zipper sections and sealed edges anymore
Explanation: No ink sticking appears at the middle sealed overlapping areas
Explanation: No discoloration or ink sticking occurs under high temperature and high pressure at the sealed edges and overlapping areas of eight-side seal pouches
