Which term refers to the fiber alignment direction in paper?

Which term refers to the fiber alignment direction in paper?

• A. Opacity
• B. Basis Weight
• C. Grain Direction
• D. Pantone Matching System used for color consistency

Answer: (C)

Fiber alignment direction in paper is called the grain direction. In papermaking, fibers tend to align along the path the sheet moves through the machine, creating this grain direction, which runs lengthwise in most sheets. This direction matters because it affects how the paper folds, tears, and prints—the grain direction is stronger and more fold-resistant along the grain and can behave differently across the grain. The other terms describe different properties: opacity is how much light passes through the paper, basis weight is the mass per area, and the Pantone Matching System is used for color standardization.

Fiber alignment direction in paper is called the grain direction. In papermaking, fibers tend to align along the path the sheet moves through the machine, creating this grain direction, which runs lengthwise in most sheets. This direction matters because it affects how the paper folds, tears, and prints—the grain direction is stronger and more fold-resistant along the grain and can behave differently across the grain. The other terms describe different properties: opacity is how much light passes through the paper, basis weight is the mass per area, and the Pantone Matching System is used for color standardization.