Toner cracking

When the media is folded and the crease aligns with a line of text, it is possible with certain types of media for the text to break along the line, giving the appearance of a white line through the text. Media that does not meet the smoothness (100 to 250 Sheffield, 100 to 500 Bendtsen) or wax pick (>11 Dennison) is likely to exhibit this effect more than other media.

Toner in the HP LaserJet printers is composed of minute particles of pigmented plastic material (styrene) and iron oxide. When the toner is subjected to the fusing temperature, these individual, iron-impregnated plastic particles become part of a larger plastic image on the page. When the printed page is subsequently folded, the plastic image must also give in some fashion to accommodate the fold. If the print image has been well-set into the paper, the resulting break in the plastic will not be apparent. However, if the toner is unable to adequately penetrate the paper fibers, or if in the process of folding the paper the paper fibers behind the toner break away from the page itself, the result will be a “white line” through the image. There are several ways to minimize this effect:

•Ensure that the media being used meets all of the specifications provided in the HP LaserJet Printer Family Print Media Guide, in particular the smoothness and wax pick.

•A lighter density setting will ensure that the toner image will be composed of less plastic material, thus minimizing the resulting effect of trying to fold the toner image.

•For the reasons listed earlier, a more narrow, character-stroke width might also help.

•Magnetic Ink Character Recognition (MICR) paper might fix toner cracking problems (see also the HP MICR User’s Guide).

In photocopier (laser) printing, using media that has a laid finish often causes problems. The surface roughness of the media is often responsible for the problems.

Media that is stiffer than photocopier paper also causes problems. Stiff media does not fold well. Problems increase when stiff media is folded and a toner image is applied to the media’s surface.

168 Chapter 6 – Toner cartridge information

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HP LJ 4000TN, LJ 2100M, LJ 2100TN, LJ 1100AXI, LJ 1100SE, LJ 1100ASE manual Toner cracking
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LJ 2100, LJ 1100SE, LJ 1100A, LJ 4000TN, LJ 1100AXI specifications

The HP LaserJet series has long been recognized for its reliability and performance in the world of personal and office printing. Among its noteworthy models are the HP LaserJet 4000, LaserJet 2100TN, LaserJet 2100M, LaserJet 1100ASE, and LaserJet 1100AXI. Each model brings its own unique features, technologies, and characteristics that cater to various printing needs.

The HP LaserJet 4000 is a robust workhorse designed for medium to large office environments. It features a print speed of up to 20 pages per minute and a maximum print resolution of 1200 x 1200 dpi, ensuring crisp and clear text and graphics. Equipped with a 90 MHz processor and 8 MB of RAM, the 4000 can handle complex documents with ease. It supports HP’s built-in networking capabilities, allowing multiple users to share the printer effortlessly. Additionally, its versatility extends to various media sizes and types, making it suitable for diverse printing tasks.

The LaserJet 2100TN is another commendable model that offers both performance and value. With a print speed of 20 pages per minute and a resolution of 600 x 600 dpi, it’s an ideal choice for small to medium-size businesses. Its advanced HP Smart Printing technology increases its efficiency by optimizing print quality and minimizing paper wastage. The model comes with a 250-sheet tray and supports optional paper feeders, enhancing productivity for high-volume printing tasks.

The HP LaserJet 2100M features an intuitive design that emphasizes user-friendliness. It boasts the same print speed and resolution as the 2100TN but includes an additional 32 MB of RAM, allowing for enhanced processing power. The model supports direct printing from various devices, making it a versatile option for busy office environments.

The LaserJet 1100ASE and 1100AXI models are suited for smaller teams or home offices. Both models deliver reliable performance with print speeds of up to 10 pages per minute. The 1100ASE comes equipped with a parallel port for easy connectivity, while the 1100AXI includes USB support for modern devices. With a compact design, these printers fit perfectly in space-constrained environments without sacrificing print quality, with a maximum print resolution of 600 x 600 dpi.

Overall, the HP LaserJet 4000, 2100TN, 2100M, 1100ASE, and 1100AXI cater to a range of printing needs, offering diverse features and technologies. They are recognized for their durability, efficiency, and exceptional print quality, making them a standout choice for any printing requirement. Whether for high-volume office tasks or everyday documents, these models exemplify HP's commitment to excellence in laser printing.
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