General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
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GB/T 19851.4-2005
Scope
This part of GB/T 19851 specifies the classification, specifications, technical requirements and testing methods of basketballs for junior high schools and primary schools (hereinafter referred to as basketballs for primary and secondary school students). This part is applicable to basketballs for primary and middle school students made of rubber veneer and entrained reinforcement layer (hereinafter referred to as rubber ball) and glued process (hereinafter referred to as rubber ball).
GB/T 19851.4-2005 Referenced Document
GB/T 3512 Rubber, vulcanized or thermoplastic.Accelerated ageing and heat resistance tests.Air-oven method*, 2014-12-22 Update
GB/T 528 Rubber,vulcanized or thermoplastic.Determination of tensile stress-strain properties*, 2009-04-24 Update
GB/T 531 Rubber--Determination of indentation hardness by means of pocket hardness meters