EmailColor laser printers versus inkjet printers
Laser printers offer crisp text, faster print speeds, the ability to handle high-volume printing and cheaper per-page printing costs. For users that print infrequently, laser printers (which use a dry powder called toner) have the hidden advantage of not drying out. Laser owners don't have to deal with dried-out cartridges clogging nozzles and wasting expensive ink and time -- a common problem for inkjet owners.
Due to the way the toner is applied -- using heat to bind the toner to the paper -- laser prints have the additional advantage of being more smudge- and water-resistant than most inkjet prints. Laser printers are also capable of printing finer lines and details in graphics. Many are PostScript and PCL compatible, a must for graphic designers and others who print EPS (encapsulated PostScript) graphics and PostScript files.
Inkjet printers are still better for printing photos. Laser printers generally produce mediocre photo output. However, many laser printers can print photos that are good enough for use in newsletters or internal business documents.
Laser printers can handle a much higher volume of prints than inkjet printers can. Buyers that do a lot of printing should consider a printer's monthly duty cycle, which determines how many prints a printer can comfortably handle in a month. In general, cheaper laser printers have much lower duty cycles than the higher-end printers; sub-$500 printers typically have duty cycles of around 35,000 pages a month.
Laser printers really shine in cost savings. Experts emphasize that although the toner cartridges used by color laser printers cost more than most inkjet cartridges, they generally provide thousands more pages of output, making their per-page printing costs far less. Manufacturers often offer high-capacity cartridges, which brings down the per-print cost even further. For those that do high-volume printing, even a one-cent difference per page can save hundreds or possibly even thousands of dollars over the lifetime of the printer.
When shopping for a color laser printer, consider:
- Networking. If you plan to connect to your printer via a network, make sure that the printer is network compatible. You might have to buy an Ethernet card, though experts recommend getting a network-ready printer to make the process as easy as possible. Printers with Ethernet connectors are designated with the letter "N" at the end of a model number. For those on a Mac network, experts at Macworld recommend getting a Rendezvous-enabled printer for easier set up and access.
- System requirements. Make sure the printer has drivers for the operating system of your computer -- especially if you are using a Macintosh. Any new printer should be certified for Windows Vista, but if the model has been on the market for a couple of years, you should confirm it will run under Vista.
- PostScript and PCL. If you plan to use the printer for desktop publishing or graphic design, experts at Smart Computing recommend purchasing a model with PostScript Level 3 capability. PostScript is the format developed by Adobe for professional printing and having it will enable your printer to properly print PostScript fonts. You should also get a printer with PCL (printer control language) Level 5 or higher, the printer standard developed by Hewlett-Packard. Most are compatible with both.
- Consider speed. Cheap personal printers are slower than their more expensive corporate counterparts. However, any printer is fast enough unless you're printing in high volume.
- Look for a multipurpose tray or bypass feed. If you will often print labels, card stock, envelopes or other challenging media, a printer's paper path and alternative feeding options (if any) should be a major consideration. The printer's paper path needs to be no sharper than 90 degrees to consistently handle envelopes, labels, transparencies and card stock. Many have a bypass feed for this purpose.
- Volume (duty cycle). Those who need a high volume of prints should pay attention to the printer's monthly duty cycle. PCMag.com recommends that "if the number of pages you print is large enough to be a concern, a good rule of thumb is to pick a printer with a monthly duty cycle that's about four times the number of pages you expect to print each month." Most inexpensive color laser printers have about a 35,000-page duty cycle. Business laser printers have duty cycles of 80,000 or more.
- Memory. RAM is important to laser printers, as it affects how well a printer can process complex or large graphics. If you intend to print a lot of graphic-intensive documents, you may need to add more RAM to your printer.
- Paper capacity. If you expect to do a high volume of printing, buy a printer with high-capacity trays or drawers to minimize the number of times that you need to refill it. Some printers have higher capacity or additional drawers as an option.
- Cost and availability of consumables. Most reviewers attempt to calculate cost of use, but they usually rely on the manufacturers' estimations of cartridge life and arbitrarily determine the cost of replacement toner (which may change). While that isn't a purely scientific method, reviewers do find drastic differences in the cost of use. You'll also want to investigate availability of replacement toner and supplies.
- Duplex printing. This is a time-saving convenience that allows automatic printing on both sides of a sheet of paper. Some printers offer a duplex tray as an optional accessory or have models in a series that include automatic duplexing (these have a "D" at the end of the model number). Duplexing, though essential in a busy office, may not be worth the additional expense to home users who can do it manually by printing odd pages first, then flipping the stack over and printing even pages.
How a laser printer works
Laser printers work by exposing an electrically charged, revolving drum to a laser, creating positively and negatively charged areas. Positively charged powder (toner) is applied to the drum. The toner sticks to the negative areas and is heated, causing it to become liquid and sticky. Paper is passed through the printer, and the image is transferred from the drum to the paper. The toner cools and binds to the paper. Color laser printers use the standard four printing colors: cyan, magenta, yellow and black, and they have a separate toner cartridge for each.
Initially, color laser printers required four passes over the drum (one for each color of toner), an obviously slow process that accounts for the speed difference between printing color and black-and-white pages. Printers now use a single-pass technology (usually involving multiple lasers and drums), allowing them to print pages much faster.
Because of the need to heat the toner, laser printers need time to warm up before they are ready to print. Some printers need just a few seconds. Users have noticed that printers with shorter warm-up times tend to have greater power demands.
Experts recommend buying high-yield cartridges to bring down the per-page print costs. Most toner cartridges come with a drum. Some manufacturers sell the drum separately, allowing them to sell the toner cartridges for a little less, though the manufacturer recommends changing the drum every few cartridges. Some brands issue low-toner warnings, which can be a mixed blessing. Experts warn that some printers with low-toner warnings will not print when the toner gets low even though there is some toner left in the cartridge. Sometimes removing the cartridge and giving it a little shake will help to squeeze out a few more prints or stir up toner that has settled in a cartridge that has been sitting idle for weeks.
Experts recommend that if toner spills on a counter or in a printer, you should wipe it up with a paper towel moistened with cold water (hot water might cause the toner to become sticky). Do not try to vacuum it, as the particles are too fine to be caught by the filters of most household vacuum cleaners and could end up clogging your vacuum or being blown about the house.
A study by the Queensland Institute of Technology finds that laser printers emit microscopic toner particles into the air. This might be a concern for a high-volume office printer, but probably not for home use. In the worst case, the study says emissions are equal to cigarette smoke. Even so, the emissions may not be harmful to health.