Toner is actually a very fine powder composed mainly of ground polyester.Polyester powder has a static charge, thanks to which it sticks to anything with the opposite charge.
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This principle is used precisely in printing, where toner is applied to paper and the image is drawn into the toner by a laser using a static charge.The result is then baked into the paper.
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| HP 12X Q2612X black compatible toner | Toner powder |
Due to its printing technology, every laser printer needs a photoconductor drum, which is used to transfer toner onto paper.You may also encounter names for the photoconductor drum such as optical drum (OPC drum), drum unit, or drum unit.The photoconductor drum may already be included in the toner, but for some types of printers you have to buy the photoconductor drum separately.
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| OPC drum for HP C7115A/X / Q2613A/X / Q2624A | HP 85A CE285A black compatible toner |
Toners that do not have a photoconductor drum are generally less prone to failure than those with a drum. In some cases, toner cartridges without a drum unit are also cheaper, but this is not always the rule.The main advantage of the photoconductor drum being integrated directly into the toner is that you do not have to worry about replacing it, because it is automatically replaced together with the toner.If you have a toner without a drum unit, you must replace it after some time.As with the toner, the photoconductor drum also has its lifespan specified according to the number of printed pages.This lifespan is around 10,000 pages, depending on the type.
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| Samsung MLT-R116 compatible drum unit | Samsung MLT-D116L black compatible toner |