Search

In this study, electrophotographic printing and inkjet printing systems were applied to some commercial A4 office papers and their effects on print quality were determined. It is to evaluate the print quality by determining the test parameters that measure the print quality by applying electrophotographic printing and inkjet printing systems to some commercial office papers that have determined the surface properties and optical properties supplied from the market. Print quality was measured by testing with parameters such as delta gloss 60°, print lightness, print chroma, print density. As a result of the tests determined for print quality; print density values were low in A4 office papers with high roughness and porosity values, and the specular gloss values of the samples decreased in both printing applications. In electrophotographic printing; it was determined that darker colors formed with print lightness parameter, and the color scale increases in two-sided printing with print chroma values. It was determined that the color scale of print chroma values increased in two-sided prints. It was determined that mostly some commercial office papers were positively affected by printing on one side in inkjet printing and by printing on two-sided in electrophotographic printing. [ABSTRACT FROM AUTHOR]

The objective of this study is to evaluate the suitability of hybrid poplar (P. deltoides) which is grown in Turkey as a raw material by ASAM pulping. Hybrid poplar wood samples were pulped using both ASAM (alkaline sulfite-antraquinonemethanol) and kraft processes. Kraft process was used as a control. The effect of the ASAM process' variable, cooking time, on pulp yield and quality of handsheets was examined while other pulping conditions were kept constant. After cooking for 120, 150 and 180 minutes at maximum temperature, kappa numbers were 17.4, 16.8 and 8.19 respectively for ASAM and of 24.5 for kraft. Pulp yields and the strengthvalues of ASAM handsheetswere found higher than than those for kraft. [ABSTRACT FROM AUTHOR]

ASAM with Rumex crispus extract organosolv pulping was developed by using 1,5-dihydroxy-3-methoxy-7-methyl-anthraquinone from Rumex crispus root, instead of anthraquinone. ASAM was also produced as a control pulping. Both pulps were made by handsheets from fast growing P. deltoides clone (Samsun p. clone), Robinia pseudoacacia L. and Pinus pinaster grown in Turkey for wood fibrous raw materials. The mechanical consisting tensile, bursting and tear values and optical values of ASAM handsheets yellowness, brightness and whiteness were compared to ASAM with Rumex crispus L. extracted. It is concluded that ASAM with Rumex crispus extract pulping suits well in the manufacturing of special papers.