A considerable amount of waste paper is used as low cost material in the age requiring resource and energy saving in the pulp and paper industry. Almost all paper kinds are recycled, including newspaper, paperboard, wood free paper and paper for office automation machines. The essential point of waste paper pulping is effective breaking by efficient use of power. This high-consistency disintegrator is used to study this topic. It is most suitable to investigate technological and economic use of waste paper in the laboratory.