FIELD: cleaning means. SUBSTANCE: fresh wiping solution containing softened water, sodium hydroxide, and castor oil is introduced into wiping bath. When in contact with printing machines, solution is polluted with ink. Polluted solution is passed into first tub for spent wiping solution and then into second tub, into which chemical agent is also passed. The latter is copolymer with density 1.0801.09 kg/cu.dm, pH about 7, molecular weight cca 500000, and Brooklyn viscosity cca 1000 cPs. Agents reacts with solution to give pure solution of precipitate ink, which is settled in settler. Ink-free solution is introduced into recycle tank, which is connected with fresh wiping solution preparation means and with solution pumping means. Installation can further contain ultrafiltration unit. EFFECT: created closed cycle wherein majority of spent wiping solution is regenerated and not discarded after suitable purification. 10 cl, 3 dwg
