ernels Below 5 mm in diameter 5 % MAX Broken Kernels : 3 % MAX Impurities ( Unshelled kernels, shell): 0.5% MAX Moisture : 6 % MAX Shrivelled Kernels : 1 % MAX Visible Insect damage after blanching: 1% MAX Visible rot and mould after blanching : 1 % MAX Light brown discoloured kernels or 2 % MAX