GuilhermeNoronha

Hi everyone, i need some help to start making BBs. i have a plastic indutry in Brazil, and now we on a project to make Airsoft BBs, the last answer we don’t find yet is what kind of additive i have to use for make different weight bbs. Without any additive i reached on 0,11g , what can i use for make 0,20g or 0,25g?? Apreciate your time for reading my doubt