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sustainable packaging engineering physics- unit 3- thermal physics- ther different types of design elements and how to use various design elements. sources of paper paper making process additives used types of paper making pulping process factors affecting innovative packaging pack with farm fibre bio pack eco friendly packaging merits about palm fibre pack intelligent pack cd pack efficient packing use of 3r principle. 3r principle screening paper and board recycling deinking recycled paper. wvtr otr barrier property testing wvtr and otr values of polymers water vapour transmission rate and oxygen transmis