Offset Printing in Dubai: The Plate Never Touches the Paper

A plate is treated so the image areas accept oily ink and the blank areas hold a film of water that repels it. There is no raised surface and nothing is carved. The whole process rests on that chemical difference across a flat plate.

A rubber cylinder takes the ink from the plate and presses it onto the sheet. Rubber conforms to the texture of the paper in a way a metal plate never could, which is why offset reproduces well on rough uncoated stock.

Four process colours mean four plates and four printing units, with the sheet passing through all of them in a single pass down the press. Registration between those units is what keeps a photograph sharp instead of fringed with colour.

Where a brand colour cannot be built from the four process inks, a fifth unit runs it as a mixed ink. That is the only way to match certain colours precisely, and it adds a plate and a unit to the job.

Once running, an offset press produces thousands of sheets an hour. The plates and the make ready are paid for once, so the longer the run, the smaller their share of each sheet.

A press operator adjusts the ink keys against the approved proof before the run counts, which is the step that makes the finished job match what you signed.