EDGE CURL:
Refers to the pulling away and folding back of the tape along a sharp curve in the applied tape. The edge on the outside lifts or folds back due to tension which is highest at that particular point.

ELASTIC MEMORY:
Opposite to Dead Stretch. Tapes ability to stretch and then return to its original length. Especially important for tapes such as vinyl.

ELECTROLYTIC CORROSION FACTOR:
The corrosive effect of a tape on a bare copper conductor. Expressed as a ratio with 1.0 indicating no corrosion under test conditions, and ratios of less than 1.0 signifying degrees of corrosion.

ELASTOMER:
Possessing rubber-like characteristics, both natural or synthetic origin.

ELONGATION:
Generally expressed as a percentage this is a degree of stretch. Also used to refer to - Elongation to Break.

ELONGATION TO BREAK:
The amount a tape has stretched lengthwise at the point of breaking. It is expressed as a percentage of the original, non stretched length.

ENCAPSULATING:
Embedding an electrical component in a casing of insulating material.

EPOXY:
Resinous plastic material frequently used in electrical insulation, coatings and structural uses.

EXTENDER:
A substance added to an adhesive to reduce the cost, having little effect on the functional characteristics.

EYE:
A sample of coated backing, used for In-Process testing, taken from the centre of the web at the unwind end of the coater.