ABSTRACT
In the next stage of development the two main requirements were considered together. The purpose of this stage was to combine conductivity, miscibility and application characteristics in one formulation. These were essential requirements for a successful product. It did not always prove easy to mix the material. In the first few seconds of mixing, a very fine zinc particle dust developed and was deposited in the immediate environment. This problem was overcome with a special sealing system, a lid with a hole in the middle through which the mixing spindle passes. This allows the material to be mixed without the local dust pollution.
