Bright white board made from bleached virgin fibers. Coated on one side (C1S) or two (C2S).
This is the go-to material for folding cartons, because it’s a very stark white that prints well and the board is strong. On the coated side(s), printed colors appear more vibrant and design details appear more crisp.
For higher recycled content, look into CCNB, SUS, or UUK.