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printech, May, 2001
Re: VOC Free Ink


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From:Gary Jones(gjonesprinting@aol.com )
Date:Mon, 14 May 2001 11:18:30


From your email question it is not clear as to the specific ink type that you are interested in (e.g., lithographic, screen, flexographic, rotogravure, ink jet, etc.) To the best of my knowledge, there are no inks manufactured today that contain no or zero VOCs. Inks with the lowest VOC content are generally those that are UV or EB cured, but even those inks contain a little VOC, which depending upon the ink system generally ranges from 1-4%. As a rule of thumb solvent-based inks contain the highest VOC content, while water-based inks contain considerably less VOC. Printers using solvent-based inks usually have some type of capture/cotnrol system in use to minimize emissions to the atmosphere. Certain types of lithographic printing inks, namely sheetfed and nonheatset web inks emit very little VOC (about 5% or less) because the ink solvent is very nonvolatile and remains in the print. Lithographic inks can be formulated with higher vegetable oil contents such as soy oil, that will reduce the VOC content even more, but there are no "VOC free" inks for lithographic printing.



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