Chapter 2 Handling Paper

Moisture Content

Moisture content is defined as the percent ratio of moisture to the dry mass of the paper. Moisture can affect the paper’s ap- pearance, feedability, curl, electrostatic properties, and toner fusing characteristics.

The moisture content of the paper varies with the relative hu- midity in the room. When the relative humidity is high and the paper absorbs moisture, the paper edges expand, becom- ing wavy in appearance. When the relative humidity is low and the paper loses moisture, the edges shrink and tighten, and print contrast may suffer.

Wavy or tight edges can cause misfeeding and alignment anomalies. The moisture content of the paper should be 4 to 6%. To ensure the proper moisture content, it is important to store the paper in a controlled environment. Some tips on moisture control are:

Store paper in a cool, dry location.

Keep the paper in its wrapping as long as possible. Rewrap paper that is not in use.

Store paper in its original carton. Place a pallet, etc., under the carton to separate it from the floor.

After removing paper from storage, let it stand in the same room as the printer for 48 hours before use.

Avoid leaving paper where it is exposed to heat, sunlight, or damp.

Paper Grain

When paper is manufactured, it is cut into sheets with the grain running parallel to the length (long grain) or parallel to the width (short grain). Short grain paper can cause feeding problems in the printer. All paper used in the printer should be long grain.

Other Paper Properties

Porosity: Refers to the density of the paper structure; that is, how openly or compactly the fibers are bonded.

Stiffness: Limp paper can buckle inside the printer, while pa- per that is too stiff may bind. Either way the result is a paper jam.

Curl: Most paper has a natural tendency to curl in one direc- tion. The paper should be loaded so that the natural curl is downward, to counteract the upward curl imparted by the printer. Printed sheets will then come out flat. Most paper also has a top and bottom surface. Loading instructions are usually given on the paper package.

NOTE

If the paper is considerably curled in one direction, e.g. when the paper was used to print on one side, try to roll the paper in the opposite direction to counteract the curl. Printed sheets will then come out flat.

Electrostatic properties: During the printing process, the pa- per is electrostatically charged to attract the toner. The paper must be able to release this charge so that printed sheets do not cling together in the output tray.

Whiteness: The contrast of the printed page depends on the whiteness of the paper. Whiter paper provides a sharper, brighter appearance.

Quality control: Uneven sheet size, corners that are not square, ragged edges, welded (uncut) sheets, and crushed edges and corners can cause the printer to malfunction in var- ious ways. A quality paper supplier should take considerable care to ensure that these problems do not occur.

Packaging: Paper should be packed in a sturdy carton to pro- tect it from damage during transport. Quality paper obtained from a reputable supplier is usually properly packaged.

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HP WP36/50 manual Moisture Content, Paper Grain, Other Paper Properties

WP36/50 specifications

The HP WP36/50 is an innovative calculator designed specifically for advanced users, particularly in the fields of engineering, mathematics, and financial analysis. This powerful tool offers a blend of functionality and efficiency, making it an indispensable device for professionals and students alike.

One of the standout features of the HP WP36/50 is its extensive set of mathematical functions. With support for various advanced calculations, including calculus, linear algebra, and complex number computations, users can perform intricate mathematical operations with ease. The calculator is equipped with Algebraic and RPN (Reverse Polish Notation) input modes, catering to different user preferences and enhancing usability.

The display of the HP WP36/50 is another significant feature. It boasts a high-resolution LCD that provides clear visibility of complex equations and graphs. This is particularly beneficial for users who rely on visual representations of data to analyze information effectively. The calculator also supports multi-line input, allowing users to view and edit equations easily, thereby improving workflow efficiency.

In terms of memory, the HP WP36/50 offers ample storage capacity for variables, functions, and data sets. This capability is essential for users who need to retain and access a significant amount of information without the hassle of re-entering data repeatedly. The calculator also supports programmable features, enabling users to create custom functions and automate repetitive calculations, which further enhances productivity.

The HP WP36/50 incorporates advanced connectivity options, including USB and Bluetooth compatibility, allowing it to connect with other devices for data transfer. This feature is particularly advantageous for users who need to share results or collaborate with peers. Additionally, the calculator supports various file formats, making it easier to export data for presentations or further analysis.

Battery life and durability are also noteworthy characteristics of the HP WP36/50. Designed for extensive use, it features a long-lasting battery that ensures reliable performance during prolonged calculations. The robust build quality of the calculator emphasizes its suitability for daily use, even in rigorous environments.

Overall, the HP WP36/50 combines sophisticated technology with user-friendly design, making it an excellent choice for anyone requiring a high-performance calculator. Its features, such as advanced mathematical capabilities, multi-line display, extensive memory, and connectivity options, distinguish it as a top-tier device in the world of scientific calculators.