The insulation in ECM should have_____

Desirable qualities of insulation are as follows-
? Adhesion to the tool: preformed insulation can be held to the tool by shrink fitting, adhesives or fasteners
? Sealing without pores or leaks that could cause stray machining by current leakage
? Adequate thickness
? Smoothness to avoid disturbing the flow of electrolyte
? Resistance to heat for continuous service at 200°C without breakdown
? Durability to resist wear in guides and fixtures
? Chemical resistance to the electrolyte
? High electrical resistivity
? Uniform application to minimize disturbance of the flow of electrolyte and to prevent interference
? Low water absorption.