Abstract
Optical properties of handsheets made from pulp resulting from deinking flotation of multicolored and desaturated prints from digital and conventional offset printing have been observed. The prints were made on different models of digital offset machines. One series of prints was naturally aged for the period of one year and the other was accelerated aged in a climatic chamber. The results show that the model of the printing machine, even with the same technology, can affect the size of particles and the optical properties of the handsheet. The quality of deinking pulp and the efficacy of the ink removal in relation to the optical parameters such as brightness, reflectance in the determined areas of wavelengths and color are discussed in this work.
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