Paper is a fairly translucent substrate. The thinner/lighter weight or higher character the newspaper the to a greater extent than translucent it is. The outcome is "show-through" - seeing a ghost icon of what was printed on the contrary side - whether reading the page itself or scanning/photocopying it.
Scan alongside coloring bar as well as text on the adjacent page showing-through.
Close upwardly thought of show-through.
To eliminate show-through inward scans and/or photocopies, merely house a slice of dark newspaper behind the canvas that y'all are scanning. This evens out the tonality of the page as well as effectively eliminates show-through.
Recently, J P Imaging, amongst their experimental Miracle Plate* technology, has demonstrated a unique concept – that of switching an uncoated litho ‘blank’ uncoated plate from hydrophobic to hydrophilic. The benefits of this technology, if it becomes a product, is the potential elimination of all chemicals inward plate coating, organic solvents from the coating process, equally good equally all requirements for processing equipment too associated chemistry. It would too convey major environmental benefits past times drastically reducing the need for aluminum inside the printing industry. The annunciation has renewed involvement inward option ways to icon plates for outset lithography. One such option was demonstrated equally a proof of concept at GraphExpo inward 2000. The CreoScitex "SP Plateless Technology" was a plate imaging arrangement where a plate could last imaged, too reimaged, past times spraying an ink receptive coating (Agfa Lightspeed) on it piece the plate wa...
The average ink savings yesteryear switching from, for example, a 175 lpi AM/XM halftone to a xx micron FM halftone, is well-nigh 10-15% (depending on the hit of tones inward the master copy art). Since the average sheetfed printer volition pass well-nigh 3-4% of their gross lucre on ink, equally an example, for a $10,000,000 dollar a twelvemonth printer the ink savings using FM screening volition hit from well-nigh $35,000 to $52,500 a year. The reduction inward ink usage for the same terminal presswork appearance, comes primarily from the utilization of a cut-back flexure applied to the FM screened plate, the thinner ink cinema feature of FM screening, in addition to the higher percent of the tonality beingness created optically (optical dot gain) . How higher dot gain saves ink The smaller the halftone dot is, the greater its perimeter to expanse ratio is. Since dot gain occurs at the perimeter of the dot this results inward smaller dots having to a greater extent than dot ga...
Although color films are manufactured for measure atmospheric condition of exposure, all the careful run of the lensman too manufacturer may endure negated if a transparency, or whatever color painting for that matter, is viewed nether improper lighting conditions. Today, nigh people inward the graphic arts are aware that the low-cal nether which color originals is viewed has been standardized too specified (5000˚K (a.k.a D50) lighting - ISO 3664 - "Viewing too lighting standards"). However, this was non ever so. The "chromocritic" was developed yesteryear the Macbeth fellowship of Philadelphia to solve this occupation inward an ingeniously practical way yesteryear assuring accurate interpretation of transparency colors. It contained 2 manually controlled low-cal sources yesteryear which the customer could choose a for sure temperature low-cal at which the transparency pleased him. Ad men, circa 1959, inspecting a color transparency using the Macbeth chromocriti...
Comments
Post a Comment