The paper is then fed onto reels if it is to be used on web printing presses, or cut into sheets for other printing processes or other purposes. The fibres in the paper basically run in the machine direction. Sheets are usually cut "long-grain", i.e. with the grain parallel to the longer dimension of the sheet.
What is the paper fed onto unless it is going to be cut into sheets? (If the question is unanswerable, say "unanswerable")
unanswerable