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Shown below are the definitions for: K
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K & N ink receptivity A test (using a special ink or dyed oil provided by K & N Laboratories Inc.) to evaluate the absorption of ink by a paper surface. The paper surface is smeared with an excess of the K & N ink and after a specified time, the unabsorbed ink is wiped off the sheet. The depth of color remaining (absorbed ink) is measured, usually with a reflectance instrument .
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kaolin A white clay which in its beneficiated condition, is used as an opacifier and to promote paper smoothness, in the paper machine furnish, and as a pigment in coatings.
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king roll The bottom roll in a calender stack, usually the largest diameter in the stack and the only driven roll in the stack.
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kiss impression A very light printing impression, with just enough pressure to create an image and transfer of ink to the paper; a term used to signify ideal impression pressure when printing by the letterpress processor when printing pressure sensitive carbonless papers.
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kraft Also known as the sulfate process; a process and the product resulting from the pulping of wood, using a sodium hydroxide (alkaline) and sodium sulfide solution, under conditions of high temperature and pressure; a "strong" pulp. Kraft is the most widely used wood, chemical pulping process; see "soda" for the less widely used alternative alkaline pulping process. Kraft also refers to the strong brown paper used for packaging, like brown grocery bags.
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