 Up until the invention of wove paper around 1756, these screens were made up of thicker, more widely spaced wires around which were woven finer and more tightly packed wires.The traditional laid pattern thus consists of a series of wide-spaced lines (chain lines) parallel to the shorter sides of the sheet and more narrowly spaced lines (laid lines) at right angles to the chain lines.A further distinction exists between what are called "antique laid" and "modern laid" papers.