1.1 These test methods cover procedures for testing pressure-sensitive adhesive-coated tapes to be used as electrical insulation. These tapes are classified as follows: 1.1.1 Class 1—Non-elastomeric backings made from materials such as: Paper, flat or creped, Fabric, uncoated or coated, Cellulose ester films, Polyethylene terephthalate (polyester) films, Fluorocarbon polymer films, Composite filament films,