ISO 2550:1972 PDF Download

The purpose of the ISO 2550:1972 standard for Textile Floor Coverings—Hand-Made Carpets—Determination of Types of Knots is to describe the many kinds of knots that are employed in the production of hand-made carpets. The standard offers a visual approach for classifying these various knot forms. It works with a variety of carpet types where knots are tied using either fingers or hooks.

Examples of the various knot types are provided in the standard and are shown in figures. These examples aid in further elucidating the standard's visual methodology. Manufacturers and consumers of hand-made carpets can precisely identify the specific type of knot used in the carpet's production by adhering to the rules outlined in ISO 2550:1972.