Question
What does C1S and C2S mean and what is the difference?
Answer
C1S and C2S describe how many sides of a paper stock carry a coating, a smooth clay layer that sharpens ink and color. C1S refers to a stock that is coated on only one side, while C2S is coated on both sides. The uncoated side of a C1S sheet stays more porous and matte, which is useful when one face needs to be written on or glued.
| Term | Meaning | Typical use |
|---|---|---|
| C1S | Coated one side | Packaging, labels, postcards, mailers, tent cards, pieces needing a writable or glueable back |
| C2S | Coated two sides | Double-sided cards, postcards, covers, and brochures printed and finished on both faces |
- Coating on a side means smoother ink holdout and sharper color on that face.
- C1S is a common pick for postcards and mailers where the back holds an address or a handwritten note.
- Choose C2S when both sides print with images or color, and C1S when only one side needs the polished look.
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