Question

In a paper mill bleaching powder was not added while preparing paper pulp. The paper obtained yellowish and brownish in color what is the reason

Answer 1

Bleaching of wood pulp is the chemical processing of wood pulp to lighten its color and whiten the pulp. The primary product of wood pulp is paper, for which whiteness (similar to, but distinct from brightness) is an important characteristic.[1] These processes and chemistry are also applicable to the bleaching of non-wood pulps, such as those made from bamboo or kenaf.