A 1929 trade-journal article by E. Ullrich of Krefeld on the types of moire effects in fabrics and how they are produced. It distinguishes genuine moire from pressed, impregnated or imitated moire. It explains that genuine moire needs plain-weave rib fabrics with fine, closely set warp and heavy filling, and describes how two fabrics are doubled face to face and pressed, with cross-section diagrams. It also covers calenders, mangling machines, plate presses and decating machines, and tips for keeping picks parallel. Part 1 of a series, ending "To Be Continued".