Screen Fabrics come in either Monofilament or Multifilament.
Monofilament Fabric is woven of a single thread. It is uniform in weave, giving a smoother ink flow and resulting in a sharper print. Monofilament fabric mesh count is determined by the number of threads per linear inch. The fewer threads per inch, the larger the size of the openings, and the more space for ink to get thorugh to the fabric. Monofilament fabrics are designated by a number, such as 86 or 109.
Multifilament Fabric is woven of a twisted strand thread. It is less uniform in weave than monofilament fabric, but it has more tooth for easier adhering of stencils and heavier ink deposit. The courseness of the fabric is indicated by a number followed by an XX, for example 8XX, with 6XX being the coarsest and 16XX the finest.