Hot Creep / Solvent Extraction / Wafer Boil Tests

Why are the tests done?

In the 1970's the predominant insulation was thermoplastic polyethylene. At this time, thermoset
(XLPE/EPR) compounds were becoming commercially available. To differentiate between the two, tests
were needed to ensure that these compounds weren't being misrepresented in the industry. The tests
were also applicable to semiconducting shields that were introduced later.