Abstract: This invention provides an integrated system for recovering fibers from mixed grades of waste paper and simultaneously cleaning (deinking) waste fibers. The system comprises a mild alkaline pulping process with oxygen and hydrogen peroxide followed by rapid decompression of fibers and then by hot washing.

Abstract: An instructional and recreational device with means for producing a drawing, means for simultaneously developing ability in spatial relations and numerical or alphabetical usage. The device is a self-contained system including writing implements, game components, and writing surfaces. A plurality of variously shaped game boards are provided with variously shaped apertures therein for receiving complementarily-shaped element blocks having numbers, letters, or the like thereon. By placing a block in an appropriate aperture, a user may develop his spatial relations skills while increasing recognition of language symbols. The device also has means for drawing or writing, including a blackboard and a continuous, rolled supply of drawing paper.