A method for manufacturing bamboo stats uses high quality window blinds. The friction collar is manufactured to have an inner surface wherein the inner surface includes portions with various diameters. Each protrusion is received in and meshes with a respective recess, and the lateral outer face is in face-to-face contact with the lateral inner face when two of the nut bodies are stacked and are tensioned on a screw bolt. The organic-inorganic matrix may be an organically modified glass. The sheet is passed along a straight, generally unheated copy path through a plain paper, color inkjet photocopy machine to reproduce thereon the color image placed on the photocopy glass.