什麼是膠印;平版印刷
一種廣泛採用的印刷方法︰圖文部分著墨後,先印在橡皮滾筒上,再轉印到紙張或其他材料上面。由於橡皮滾筒的撓曲性大,木料、布、金屬、皮革、粗糙紙張等都可以印刷。膠印印版上的圖文,既不像凸版(參閱letterpress printing)那樣凸出於版面,也不像凹版那樣低於版面,而是與印版在同一平面上,因此屬於平版印刷。膠印由平印發展出來,以水和油不相溶合的原理為基礎,圖文部分經過感脂處理,能吸收油墨,空白部分因含有水分,而不吸收油墨。膠印版通常用鋅、鋁或其合金製成,表面經過處理,使其具有滲透性,然後塗上一層感光材料。用原稿曝光後,圖文部分的塗層硬化,空白部分的塗層被沖洗,露出潤溼的金屬,不吸收油墨。
offset printing
orlitho-offsetIn commercial printing, a widely used technique in which the inked image on a printing plate is imprinted on a rubber cylinder and then transferred (offset) to paper or other material. The rubber cylinder gives great flexibility, permitting printing on wood, cloth, metal, leather, and rough paper. In offset printing the matter to be printed is neither raised above the surface of the printing plate (as in letterpress printing) nor sunk below it (as in intaglio, or gravure, printing). Offset printing, a development of lithography, is based on the principle that water and grease do not mix, so that a greasy ink can be deposited on grease-treated printing areas of the plate, while nonprinting areas, which hold water, reject the ink. The offset plate is usually of zinc or aluminum or a combination of metals, with the surface treated to render it porous and then coated with a photosensitive material. Exposure to an image hardens the coating on printing areas; the coating on nonprinting areas is washed away, leaving wetted metal that will reject ink. See also xerography.
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如影隨形是什麼意思?
意思是:好像影子老是跟著身體一樣。比喻兩個人關係親密;常在一起。成語名字:如影隨形成語發音:rúyǐngsuíxíng成語解釋:好像影子老是跟著身體一樣。比喻兩個人關係親密;常在一起。成語出處:先秦管仲《管子任法》:“然故下之事上也,如響之應聲也;臣之事主也,如影之從形...
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罄山採木是什麼意思?
意思是:罄:完,盡。把山上的樹木全部採光。比喻殘酷剝削成語名字:罄山採木成語發音:qìngshāncǎimù成語解釋:罄:完,盡。把山上的樹木全部採光。比喻殘酷剝削成語出處:《舊五代史·唐書·張延朗傳》:“若使罄山採木,竭澤求漁,則地官之教化不行,國本之傷殘益甚,取怨黔首,是黷...
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已丑年是哪一年
己丑年就是農曆一甲子中的一個,比如2069年、2009年、1949年、1889年等,60年一週期,是丑牛年。所謂農曆的干支紀年,也就是以十天干:甲、乙、丙、丁、戊、己、庚、辛、壬、癸,依次按順序配十二地支:子、醜、寅、卯、辰、巳、午、未、申、酉、戌、亥(。即甲子、乙丑、丙寅...
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小試牛刀是什麼意思?
意思是:稍微用一下宰牛的刀。比喻有大才的人在小事上試一下身手成語名字:小試牛刀成語發音:xiǎoshìniúdāo成語解釋:稍微用一下宰牛的刀。比喻有大才的人在小事上試一下身手成語出處:清·百一居士《壺天錄》上卷:“簿書錢穀之餘,小試牛刀,敢謂愛民如子弟。”成語繁...