EXPERIMENTAL PLATE BLACK AND WHITE
The other experiment which is really more of a judgement consists in holding before a brillant light a complex multi-dimentional drawing (in black and white) or an etching which has this multi-dimentional quality and saying whether it gives a perception tending toward the cool or toward the warm. How could a black and white etching yield a warm or a cool coloured image? But it is challenging forced to be to differentiate - and one can, half-closing one's eyes, emptying the mind, suddenly (or slowly) receive the impression.
Fig.188. Experimental plate black and white, etching.
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