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The duplex/disintegrator/ dissolver, which is a recent addition to the Silverson range of mixing equipment, is actually two machines combined into one. It has always been a feature of Silverson equipment that an individual machine could be adapted by rapidly‐interchangeable working heads. In the manufacture of paint, a change‐over of heads in the middle of the process has proved to be an advantage, and in certain cases a necessity. With this in view research resulted in the development of the duplex/ disintegrator/dissolver, which incorporates two separate heads on a single frame. The function of the upper head is the disintegration of large solids and the instantaneous wetting of difficult powders. It is virtually a separate mixing chamber into which all solids and powders are drawn, instantly dispersed or size reduced before being allowed to pass into the mix. The result is a significant increase in high‐velocity capability and reduction in processing time.