When you see the photos of coffee bags on alibaba shop, their appearance are always perfect without any defects, is this the real case? I am going to show you through a live video.
Quad seal effect comes from side gusseted bag, so this type of coffee bag is usually called quad seal side gusseted coffee bag
For full matte black coffee bags, small hidden lines on the surface is a most common problem, and that deteriorate the packaging and branding for coffee roasters. Let’s see why it happens