(57) Two or more pasty materials may be accurately formulated together by sequentially
extruding the desired amounts of those materials into a tube (5) with graduations
(7) associated with it to measure the amounts extruded. After the components have
been put serially into the tube (5), they are removed from the tube, e.g. by squeezing
the tube and moving the squeeze towards one end, and mixed to homogeneity. Preferably
the mixing takes place in a container on to which a lid may be put and from which
the mixture may then be extruded, e.g. by having a movable base on the container which
then acts as a piston to extrude the mixed formulated paste through a nozzle in the
lid.
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