Chemical deinking of prints obtained by non-impact printing

The paper the results of efficiency investigation of chemical deinking of non-impact prints, where the principle of electrophotography is used for obtaining the latent image, on which the toner could adhere. The basis of scientific prepositions of deinking flotation and the mechanism for particle separation in the explanation of the results of experiment are given. The optical properties of hanh- sheets in relation to the particle separation mechanism, their size, from and structure are discussed. The results obtained by deinking flotation of a mixed sample from the prints of non-impact printing and the conventional offset printing show clearly the influence of the specific characteristic of prints techniques and the chemical composition of toner, i.e. of printing inks on the quality of recycled fibres.