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