Have you ever noticed a thin line on a skincare bottle, cream jar, or cosmetic cap?
It may become more visible under certain lighting, and sometimes you can even feel a slight ridge when running your finger across the surface.
Is it a manufacturing defect? Not necessarily.
This line is commonly known as a parting line. It is a feature that may appear on molded packaging, depending on the mold design, manufacturing process, and product structure.
Understanding parting lines can help beauty brands evaluate packaging samples more accurately and make better decisions about product design and decoration.
2026-10-14
