Realizing that a quality platemaking operation in film-based workflows of yesteryear wouldn’t consider running their business without a film densitometer, today’s computer to plate workflowssimilarly call for a plate meter to ensure quality and consistency in the platemaking operation.visual characteristics of the particular plate that is being used. How to use densitometer in a sentence. trailer << /Size 97 /Info 57 0 R /Root 61 0 R /Prev 104555 /ID[<14e0201c1fafdd20a8bb7fad8f88831a><9f1a4b0cea48cb291626b3c1bea80045>] >> startxref 0 %%EOF 61 0 obj << /Type /Catalog /Pages 59 0 R /Metadata 58 0 R /OpenAction [ 63 0 R /XYZ null null null ] /PageMode /UseNone /PageLabels 56 0 R /StructTreeRoot 62 0 R /PieceInfo << /MarkedPDF << /LastModified (D:20011016122535)>> >> /LastModified (D:20011016122535) /MarkInfo << /Marked true /LetterspaceFlags 0 >> >> endobj 62 0 obj << /Type /StructTreeRoot /ClassMap 8 0 R /RoleMap 10 0 R /K [ 44 0 R 45 0 R 46 0 R ] /ParentTree 48 0 R /ParentTreeNextKey 2 >> endobj 95 0 obj << /S 86 /L 175 /C 191 /Filter /FlateDecode /Length 96 0 R >> stream 0000055065 00000 n
Establishing and maintaining correct solid ink densities is critical for color accuracy and repeatability as color separations are made based on a specific set of solid ink film densities.Beyond density, additional print metrics can also be calculated on densitometers using standardized equations to achieve the following:While Density is useful for controlling the solids, TV or TVI monitors the halftones while Print Contrast will keep an eye on your shadow areas. For this reason, the densitometer quickly surpassed the capabilities of even the best trained eye for monitoring ink film thickness on a printed sheet. Now, "Tint" should be highlighted. Greater or lesser degrees of measurement consistency can be expected due to these variables; those that utilize dedicated plate meters can expect to better control their platemaking operation regardless of the characteristics of the plates and screening methods utilized.In summary, those that use densitometers to measure plates run the risk of introducing more variance into their process control than necessary: today’s dedicated plate meters are easy to use and yield consistent results across a wide range ofplate and screening types, and are relatively inexpensive especially when considering what is at stake in terms of time, materials and dissatisfied customers if platemaking inconsistencies are not being detected.Even with all of these factors considered, some shops still use a densitometer for platemaking. One other thought on avoiding the use of the transmission densitometer for digital negatives. In visual methods, two beams of equal intensity are used.
Now, "Solid" should be highlighted. Press the "Down" arrow until "50% CAL" is highlighted, and then press the "Enter" key. How to use a densitometer? 0000030047 00000 n 0000064747 00000 n Densitometer definition is - an instrument for determining optical, photographic, or mass density. The linear reference plate is used to ensure proper utilization of the instrument: it stands to reason that if the instrument reads the linear reference plate consistently it will also read the determined target values of the production plates consistently, as well. Press the "Previous" key (middle key) to return to "Dot Area" mode.You are now set up to read dot in a single color mode, which is appropriate for plate measurement. The "N" factor and "Save N" will be highlighted. Those metrics monitor tone reproduction quality which can change due to various print conditions.
To use the Densitometer, place the cursor over an area of the image in the Preview window to sample a pixel or group of pixels. If you still have specific questions about the differences between densitometers and spectrophotometers or which one is right for your needs, please feel free to call us and we’re happy to discuss.Your email address will not be published. Read the 100% image area of the reference plate. Any printing process from the most simple black and white work to complex color work will benefit from the use of a densitometer. On the contrary, specifying that a color is printed to match a set of CIE Lab or LCh values describes precisely how the color should be look when printed. 0000002259 00000 n The densitometer provides the Note that the instrument will give you the "density" of the tint area when you hold it down, when you lift it up it gives you the dot percentage reading.Please also note that your "Paper" (base of the plate) and "Solid" (100% plate image area) readings are critical. This is what makes spectrophotometers so much more powerful than densitometers. 0000079059 00000 n When you are finished, press the "Down" arrow until "Save & Exit" is highlighted, then press the "Enter" key to return to the "Dot Options" menu, then the "Previous" key to return to Dot mode.In "Dot Area" mode, make sure "Paper" is highlighted and read the base of the plate. Press the"Enter" key.
While most printers would agree that it is very difficult to see the difference between yellow ink at a density of 0.8 and a density of 1.0, this is an easy task for the densitometer which replaces human subjectivity with an objective measure of the ink film thickness.
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Unnecessary complexity: To use a densitometer to measure plates, it is recommended that careful procedures must be followed (as outlined below).
Furthermore, the cost of hourly rates of equipment and employees, and the ever-present competition vying for business in the commercial sheet fed market space underscores the need for stringent process control procedures that are simple for employees to follow.