TEM (a, b, and c) images of prepared mesoporous silica nanoparticles with mean outer diameter: (a) 20nm, (b) 45nm, and (c) 80nm. SEM (d) image corresponding to (b). The insets are a high magnification of mesoporous silica particle.
The Definition of a Monochrome Laser Printer. Monochrome laser printers are machines that print text and images from computers by using a laser beam to control where a single color is applied to paper. They're often faster than other types of printers and can generally produce large numbers of black-and-white documents cheaper than other printers.
The number of pages a single cartridge can print has a major influence on the actual cost per page you can expect from the printer. The average cost per page varies by the type of printer you use, with a monochrome laser printer offering the best cost per page, at around 1 to 2.5 cents per black-and-white page.o make it easier for you to determine the cost of printing when shopping for a printer, the International Standards Organization has established a set of guidelines that allows every cartridge to be classified with an approximate number of pages it will yield.