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.
Why the need for these pigment colors: White: Simply put, you can't print white! To make a white image, you just print your artwork as black and add the white foil. Grey: Printing gray on any printer is actually individual back dots that mix with the white paper in between them creating the illusion of gray. The more space between dots, the lighter the 'shade'.