Green Lead-free Solder Definition of ?Lead-free? & relatively prescript Up to now, no available international standard. ISO Draft: ?Lead-free? for plumbing solders and fluxes, Pb content should be less than 0.2wt%(USA) or 0.1wt%(EU); ISO drafts: Pb content in Lead-free Solders for electronic assembly should be less than 0.1wt%。 EU proclaimed Directive of the European Parliament and of the Council on waste electronic equipment and on the restriction of the use of certain toxicity substances in electrical and electrical equipment, which means the electronic products in Europe markets must be Lead-free since July 1,2006. Proposal for directive on prevention and cure for pollution by the production of electronic products was proposed by Minster of Information Industry, China, which also proposed a deadline of July, 1, 2006.