Rubber electrical insulation in 1945

1943 was marked In the rubber Industry by the growth of the supply of synthetic rubber and a sharp decrease in that of natural rubber. During the year, the use of natural rubber in electrical insulation was severely curtailed. This was accomplished by the limitation of the uses for natural rubber and by controlling its maximum content in insulating compounds. In the latter part of the year, the shift of insulation from natural to synthetic rubber was well under way. On January 1, 1944, the use of natural rubber was forbidden except for very special purposes.