in the present research, the effect of different peroxide charges and reaction times were investigated inhydrogen peroxide bleaching of mixed old newsprint and old magazine deinked pulp. in thebeginning, mixed recycled papers were pulped using conventional method and then deinked byflotation. in addition, deinked pulps (mixture ratio of 70% onp and 30% omg) were bleached withhydrogen peroxide a...

BACKGROUND The development in the deinking process has made recycled fiber a major part of the raw material for pulp and paper industry. Enzymes have revolutionized the deinking process obtaining brightness levels surpassing conventional deinking processes. This study explores the deinking efficiencies of bacterial alkalophilic laccase (L) and xylanase (X) enzymes along with physical deinking m...

This paper examines newspaper cartels, a largely unoccupied field in media history, from the perspective of longevity. We analyse Finnish industry 1910s to 1970s and show that newspapers sought regulate various aspects competition, such as subscription prices, advertisement tariffs, newsprint prices. Data indicates political rivalry shaped cartel collaboration until late 1950s: was set up by ri...

The durability of paper documents treated with aminoalkylalkoxysilane copolymer (co-AAAS) flexible networks, as deacidifying and strengthenening agents, was studied. To this end, a 1922 lignocellulosic newsprint co-AAASs characterized. Physico-chemical properties such pH, chromatism, opacity mechanical strength were measured shortly upon treatment several years after. In order to better underst...

Pulp and paper is considered to be the fourth most energy-intensive industry (EII) worldwide. However, as of CO2 emissions are biomass origin, this sector has potential become a carbon-negative industry. This study proposes new concept for conversion pulp carbon negative that relies on inherent capture capability Kraft process. The techno-economic performance proposed system, based calcium loop...