When we’re talking about laser printing, the toner coverage rate is simply the percentage of the page that’s covered with toner (surprise, right?). Some documents require more toner than others, therefore, the coverage rate will be higher.
Coverage rates are important because they affect how long toner cartridges will last. Toner cartridges only have a limited amount of toner in them so the number of pages a certain cartridge will print depends on how much toner it uses per page. Most documents require a coverage rate of 5%, so that’s what the printing industry uses as a base for page yield ratings. (www.astm.org)
What happens if your average coverage rate is 10% instead of 5%? With an average coverage rate of 10%, you’re using twice as much toner per page, so your page yield will be cut in half. Likewise, with an average coverage rate of 2.5%, you’re using half as much toner per page, so your page yield will double.
Here are a couple examples of what 5% and 10% coverage rates actually look like in the real world:
So what do you think your coverage rate is? Are you at the 5% mark? One way you can find out is by asking your printer. Most laser printers come with a set of built-in reports that tell you all kinds of things such as the average toner coverage rate. For Lexmark, Dell, and IBM laser printers, the coverage rate is found in a report called “Device Statistics.” While the steps for finding the report differ by printer, most require navigating to Menu>Reports>Device Statistics. Or, you may see a button with a green diamond, which you can hold down for 5 seconds. “Coverage History” should be listed on the print-out with a number (usually no % sign).
If you have any trouble, give us a call at 800.587.1173 and we’d be happy to help out!