engleski

The reproduction quality of the lines on paper substrates with straw fibers

The main raw materials for papermaking are cellulose fibers. As there are fewer and fewer forests nowadays and therefore also fewer trees as raw materials for cellulose fibers, the production of paper and paper products has significantly focused on alternative non-wood raw materials. Since straw is available in large quantities as a by-product of the crop farming, it was selected as a potential paper fiber source. In this paper printing substrates were made with usage of primary wheat, barley and triticale cellulose fibers. In order to isolate cellulose fibers, the grain straw was exposed to alkaline treatment in two ways. Isolated fibers with different weight ratios were mixed with the secondary wood fibers during the process of making handsheets. These innovative paper substrates were used for analyzing printing quality on the basis of line reproduction. High quality and proper line reproduction are extremely important features when reading barcodes. The quality tests were performed on lines printed by digital printing technology. Three main properties of lines affecting the readability of barcodes, were analyzed: blurriness, raggedness and width. They were tested and compared on different prints for the purpose of establishing what type of paper substrate was the most suitable for printing.

paper substrate; straw fibers; digital printing; reproduction quality

Ovaj rad je u sklopu SuZ financijske potpore istraživanju: “Slama pšenoraži kao izvor vlakanaca u proizvodnji novinskog papira” (voditeljica: izv. prof. dr. sc. Željka Barbarić-Mikočević).