User manual HP DESIGNJET 4500 SCANNER DESIGNJET 4500MFP AND 4500 SCANNER - COLOR GUIDE

[. . . ] Integrating your printer in to your existing environment Please download the latest PANTONE tables from the technical support section of: Notes about the document The settings and examples described in this document apply to the HP Large Format Color Copier products family using the latest version of HP Designjet Scan software available at the time of document development. 1 The colors of the copy are very different from the original. 3 The copy is not as shiny as the original . 4 There is a big difference between right and left sides of the copy . [. . . ] As the paper is moved over, small fragments of the original media or dust stuck onto the glass plate may cause image quality problems, like undesired vertical streaks appearing on the copy. To minimize this problem make sure that your original is completely dry before loading it into the scanner and, as previously mentioned, handle it with care, choosing the proper document height in the loading mechanism. If the original is thicker than 2 mm, please refer to your scanner's documentation for guidelines on how to handle it. Take care to protect the scanner from dust. 3 Cameras There are two or more cameras to digitize the full width of the original image. Each of them consists of an optics part3 and a CCD (Charge-Coupled Device), which are similar to the active elements found in digital cameras. The CCD is able to digitize the color of the pixels into three components: Red, Green and Blue. When scanning in Black and White mode a combined signal is produced from the Red, Green and Blue signals (some CCDs can generate it directly). Red patches absorb more light in the blue, green and yellow parts of the visible spectrum than in the red part. The cameras must be periodically calibrated in order to avoid undesired geometrical distortions in the final copy, as well as ensure a correct color capture. Calibration can be performed using the scanner maintenance tool provided with the system. It is advisable to run the scanner calibration every time the system warns the user to do so, or when any of the following defects appear: jagged lines, blurry images, modified colors (with respect to previous copies). 4 Electronics After each strip has been digitized, the electronics compose the whole image and apply several image treatments and linearizations to correct geometrical and color space distortions. The result is a digital image ready to be sent to the touch screen, which in turn will either store the image or send it to the printer. During the scanner maintenance process, the electronics calibrate all the responses from other elements (light, optics and CCDs) and between the CCDs themselves to obtain an accurate response. The scanner maintenance should be run whenever you suspect that copies are losing image quality due to the scanner maladjustment or periodically (e. Number of hours of usage Types of original loaded (some originals dirt the glass plate more than others) Variations of temperature and humidity The user interface is divided into three parts (see picture below): · The control section, with four main control tabs: Copy (from original to final output), Scan (for scanning to a file), Print (for printing from a file) and Setup The preview window, where you can see how the image will look when printed The toolbar, a set of command buttons at the bottom, used to start or stop various actions (e. What you see on the screen may vary slightly depending on the printer installed. 4 Large format printer The task of the printer is to place tiny drops of ink on the media (paper or other substrate) in order to form an image that corresponds to the data file received. Most of them are thermal inkjet printers, which means that little drops of ink are heated up to the boiling point and sent to the media. The amount of ink that reaches the media is controlled by the writing system of the printer (the printer's controller) and depends on the type of media and desired print quality (e. Coated paper accepts less ink than photo gloss paper and Best quality mode requires more ink than Fast mode). [. . . ] A white print on a blue background, especially used for copying maps, mechanical drawings and architects' plans. Image enhancement feature that makes the image softer and less sharp. computed Aided Design technical drawing: mechanical , electrical/electronic , architectural. Adjustment of the ratio of Red, Green and Blue (or Cyan, Magenta and Yellow) components, which aims at producing a copy free from any unwanted color cast or color bias. [. . . ]