Indigenous Cellulosic Raw Materials for the Production of Pulp, Paper and Board - Part III.- Semt-chemical and Chemical Pulps from Lannea Grandis (Jhingan)

Laboratory experiments on the production of semi-chemical pulps from Lannea grandis (jhingan) suitable for wrapping papers by the neutral sulphite and soda semi-chemical processes are described. Semi-chemical pulps were also prepared by cooking a mixture of three species of hardwoods, viz., Lannea grandis, Boswellia serrata (salai) and Garuga pinnata (kharpat). High yields of pulps and the low consumption of chemicals are the advantages of the semichemical pulping process. Easy bleaching chemical pulps suitable for writing and printing papers have also been prepared from Lannea grandis.