What is the significance of the grain direction?
Paper and board stock material is stronger in the grain direction. Knowing which dimension is the grain dimension is an important consideration for light weight papers (75# and 85#) to minimize tearing the paper during printing on using the finished product. Grain direction is less significant for thicker material. For laminated paper and board stock, the grain direction is irrelevant, since the film lamination provides added strength in all directions. Grain direction is noted for sheets with an underline on the grain dimension. For example, 28 inch x 40 inch sheets are noted as 28×40; the underline indicates that the grain direction is the 40 inch dimension.
