Recycling by product massive number of types of plastic, they each carry a resin identification code, and must be sorted before they can be recycled. This can be costly; while metals can be sorted using electromagnets, no such 'easy sorting' capability exists for plastics. In addition to this, while labels do not need to be removed from bottles for recycling, lids are often made from a different kind of non-recyclable plastic. To help in identifying the materials in various plastic items, resin identification code numbers 1-6 have been assigned to six common kinds of recyclable plastic resins, with the number 7 indicating any
Industry Standard Coding Identification Industry Standard Coding Identification Industry Standard Coding Identification (ISCI; ), also known as Industry Standard Commercial Identification) was a standard created to identify commercials that aired on TV in the United States, for ad agencies and advertisers from 1970. ISCI was invented in 1970 by David Webster Dole with the backing of the American Association of Advertising Agencies (4As), the Association of National Advertisers (ANA), the National Association of Broadcasters (NAB), the SRA and the Television Bureau of Advertising (TVB) and it was maintained and operated by Dole until 1992, when the 4As and the ANA bought ISCI from Dole.