I was at a large trade show recently and several pressmen running different brands of presses told me not to use Step 1 and 2 Roller Wash. Can you explain?
A.: There are several things at work here. The first is that many new large presses are equipped with automatic roller washing units which only utilize one roller wash product. A good water miscible wash is recommended by all manufacturers I have talked to, so that lets out both Step 1 and 2. A look back into the history of offset printing as we know it today starts back in the early part of the 1900s. Letterpress was the predominant printing method, and those presses were all washed up by hand, due to a lack of washup attachments, at least on presses built in this country. To get rollers really clean, they just scrubbed them with type wash. Offset presses were initially cleaned the same way, until washup trays were invented. The problem was that typewash quickly damaged the material offset rollers were made from back then and not a lot of technology had gone into solvents of any kind, especially for the new, upstart offset printing method. Several chemical companies may have been appr
A.: There are several things at work here. The first is that many new large presses are equipped with automatic roller washing units which only utilize one roller wash product. A good water miscible wash is recommended by all manufacturers I have talked to, so that lets out both Step 1 and 2. A look back into the history of offset printing as we know it today starts back in the early part of the 1900 s. Letterpress was the predominant printing method, and those presses were all washed up by hand, due to a lack of washup attachments, at least on presses built in this country. To get printing rollers really clean, they just scrubbed them with type wash. Offset presses were initially cleaned the same way, until washup trays were invented. The problem was that typewash quickly damaged the material offset printing rollers were made from back then and not a lot of technology had gone into solvents of any kind, especially for the new, upstart offset printing method. Several chemical companies
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