Before putting something into widespread use, production or practice, the quality, performance, reliability etc. are checked. Textile testing is an important part for textile production, distribution, and consumption. There are different types of textile testing. These are: Fiber Tests. Fiber tests include identification of fibers, grading, fiber length, strength and elongation, fineness, maturity etc. Yarn Tests. Yarns tests include yarn count, twist per unit length, strength, appearance, evenness and regularity, hairiness etc. and this test is the concern of this book.Fabric Tests. Fabric tests include strength and elongation, width, thickness, number of ends and picks per unit length, the count of yarn used, fabric weight per unit length, design and construction of the cloth, air permeability, thermal properties, stiffness, handle, drape, crease resistance and recovery, abrasion, pilling, shrinkage etc.