When it comes to inkjet printing, one of the most distinguishing things about RISO is that we use oil-based instead of water-based, or aqueous, ink – and we are the only inkjet on the market to do so. What does that mean? Let’s talk about it.
Most inkjet printers on the market use water-based ink to get your documents printed. They are fast, efficient and a more cost-friendly way (compared to toner printing, which is another topic) to get high volumes of printing done without any worry or hassle. However, when using aqueous ink, you’re essentially adding water to paper – which is made of wood pulp – and that can cause swelling and rippling of the substrate as the water is absorbed. To remove that moisture again, the printing system then requires a dryer, which dries the ink but can curl the paper, which is why high-volume jobs often need to be set aside for the paper to cool down and flatten out again before it can be conveyed to any finishing processes like folders and inserters.
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