TECHNOLOGY FOCUS - IMAGING AND COMMUNICATION - Preferred Composition: The composition is a printing ink. The composition further comprises a filler or viscosity modifier which is solid at 25degreesC and is cleavable without decomposition of the material. The cleavage of the vehicle produces decomposition products that are more volatile than the vehicle and can be evaporated to dry the composition.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The vehicle is a carbonic acid diester or a malonic acid diester. All of the decomposition products of the vehicle have a boiling point at atmospheric pressure of below 200degreesC. The vehicle decomposes at a temperature of below 200degreesC.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The material to be deposited comprises an electrically conductive polymer, a photovoltaic polymer, or an electroluminescent polymer (preferably poly (phenylenevinylene), poly(p-phenyleneethynylene), or poly (arylene) type polymer and/or a fullerene or fullerene compound; especially poly (2-methoxy-5-(2'- ethylhexyloxy)-p-phenylenevinylene), poly(2-methoxy-5-(3',7'-dimethyloctyl)-p-phenylenevinylene), poly(3-hexylthiophene), poly(N-phenylamino-1,4-phenylene-l,2-ethylene-l,4-(2,5-dioctoxy)-phenylene-1,2-ethylene-l,4-phenylene), or poly(9,9'-dioctylfluorene-co-bithiophene)). Preferred Method: The filler or viscosity modifier is cleavable by heating and/or by acidification. The composition is applied to the substrate by printing, spin coating, drop casting, casting, painting or by screen printing. The vehicle is cleavable by heating and/or by acidification. EXAMPLE - A 10 mg/ml solution of poly-3-hexylthiophene (2 ml) in chloroform was mixed with a 10 mg/ml solution of phenyl-61C-butyric acid methyl ester (2 ml) in chloroform and added to carbonic acid 1-ethyl-l,4,8-trimethyl-nonyl ester phenyl ester (2 ml), thus the mixture acquired a purple color. After thorough mixing and rotary evaporation an ink for printing was obtained.