A still further object of this invention is to provide apparatus for producing bandages, comprising means for advancing a fabric base; means for applying thereon a mixture of essentially dehydrated plaster of Paris, a binder, and a material selected from the group consisting essentially of an oxide of silicon and a mineral silicate; and means directing a fluid stream against said mixture on the fabric base to impart thereto substantial porosity and to provide a bandage having a surface of uniform coarseness throughout.