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Paper and ink testing Tests for paper and ink interaction A variety of tests are used to determine ink and paper and paperboard quality, and to measure their interactions. They are necessary to balance print quality, cost, and wear on the press. Some of the important paper and ink tests are listed here:
The basic premise of the test is that objective meaning can be extracted from responses to blots of ink which are supposedly meaningless. Supporters of the Rorschach inkblot test believe that the subject's response to an ambiguous and meaningless stimulus can provide insight into their thought processes, but it is not clear how this occurs.
Quote "the yield experienced by a given user may vary significantly from the yield measured by this test method". The temperature of the testing environment should rest at an average of 23 Degrees Celsius. Paper used in the testing procedure must approximate the medium weight paper and conform to the printers approved specifications.
Paper is one amongst several key elements determining the quality of the print; the others are the ink, the printer, the printer/paper profile, the software used for print preparation and the skill and expertise of the print-maker. Photo paper is typically divided into glossy, "matte", semi-matte, semi-gloss, satin or silk, and matte finishes ...
High-quality inkjet prints on acid-free paper can last as long as typewritten or handwritten documents on the same paper. Because the ink used in many low-cost consumer inkjets is water-soluble, care must be taken with inkjet-printed documents to avoid even the smallest drop of moisture, which can cause severe "blurring" or "running".
Printing quality is highly influenced by the various treatments and methods used in creating paper and enhancing the paper surface. Consumers are most concerned with the paper-ink interactions which vary for certain types of paper due to different chemical properties of the surface. [8] Inkjet paper is the most commercially used type of paper.
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Thus it is the preferred printing method for printing jobs requiring extreme lightfastness. The thickness of the ink layer affects the lightfastness by the amount of pigment laid on the substrate. The ink layer printed by screen printing is thicker than that printed by offset printing. In other words, it contains more pigment per area.