Cover verification NBR 15732 Clause 4.1 Brain verification NBR 15732 Clause 4.2 Verification of formats NBR 15732 Clause 4.3 Paper verification NBR 15732 Clause 4.4 Verification of sheet numbers NBR 15732 Clause 4.5 Checking holes NBR 15732 Clause 4.6 Ink check (Heavy metals) NBR 15732 Clause 4.7 Post print verification NBR 15732 Clause 4.8 Packaging verification NBR 15732 Clause 5 Phthalates NBR 15236