3 1/2p Colour error

the result of adding olive brown of the 4p, before cleaning out the olive of the 3 1/2p, you get a very thick,greasy olive brown print. the 3 1/2p colour mix error sheets were run off, probably to dicarded. and yet about 1 1/2 sheets survived, all horribly off-centre, though better centred copied exist, the ink mix is then less pronounced..