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Your editor can remember some twenty years ago—as a rather junior lab assistant— carrying out some of the peripheral work of a paint company's efforts to produce a gloss emulsion. The chief chemist, like so many others in the fifties, enthused that we were “nearly there” and that it was “just a question of the right pigment volume content”. As we all know, we were not “nearly there”, but today, it seems that at long last we are.