Differences between metallized cast-coated and metallized C1S papers
Coated one-side base paper
In most cases, coated paper manufacturers apply a clay coating to the paper after being formed on the wire. The coating is applied with a roll or knife to create a smooth coated paper finish. During this process, the machine’s rollers end up smoothing the back side of the coated sheet, providing a smoother uncoated back side in comparison to a cast coated sheet’s back side.
The metallization process of a coated one sided base paperbegins with a pre-coating layer, followed by the metallization process and will finish with a post-coating layer to ensure a completed metallized product.
Cast coated base paper
In this process, the coating isn’t always applied by the paper manufacturer. The initial coating is applied with a system that includes a heated drum roll that provides a smoother coated finishing. However, while using this heated roll, the water evaporates (or escapes) from the backside of the paper which makes the back-side rougher compares to the metallized paper with coated one-sided base paper.
A cast coated base paper, metallization can be performed directly on top without a pre coating layer due to the earlier coating process applied and finished with a post-coating layer.