{"id":180,"date":"2019-01-30T18:13:49","date_gmt":"2019-01-30T18:13:49","guid":{"rendered":"https:\/\/dns-iran.com\/?page_id=180"},"modified":"2019-02-02T17:23:24","modified_gmt":"2019-02-02T17:23:24","slug":"flexo","status":"publish","type":"page","link":"https:\/\/dns-iran.com\/index.php\/flexo\/","title":{"rendered":"Flexo printing"},"content":{"rendered":"\n

Description<\/strong><\/p>\n\n\n\n

Flexography is a printing process which utilizes a flexible relief \nplate that can be adhered to a printing cylinder. It is basically an \nupdated version of letterpress. It much more versatile than letterpress \nin that it can be used for printing on almost any type of substrate \nincluding plastic, metallic films, cellophane, and paper. It is widely \nused for printing on the non-porous substrates required for various \ntypes of food packaging. It is also well suited for printing large areas\n of solid color.<\/p>\n\n\n\n

Applications<\/strong><\/p>\n\n\n\n

Flexography continues to be one of the fastest growing print \nprocesses and is no longer reserved just for printing specialty items. \nThe ability of flexography to print on a variety of substrates allows \nthe process to be used for a wide range of printed products. Food \npackaging is an important market because of the ability of flexography \nto print on non-porous substrates. This ability makes it useful for \nprinting on plastic bags as well. Other common applications printed with\n flexography include gift wrap, wallcovering, magazines, newspaper \ninserts, paperback books, telephone directories, and business forms.<\/p>\n\n\n\n

Printing Process<\/strong><\/p>\n\n\n\n

The relief plate used for flexography is made of molded rubber or \nphotopolymer materials with the image areas raised above the non-image \nareas of the plate. Flexographic plates can be created with analog<\/strong> anddigital<\/strong> platemaking processes.<\/p>\n\n\n\n

Flexography is a direct printing method in that the inked plate \napplies the image directly to the substrate. An inked roller known as \nthe \u201canilox roller\u201d, applies ink to the raised portions of the plate \nwhich is then transferred to the substrate. The anilox roller has cells \nthat carry a specific amount of ink to the plate. The number of cells \nper linear inch can vary according to the type of print job and the \nquality required.<\/p>\n\n\n\n

The name \u201canilox\u201d is derived from the ink that was used for the \nprocess until the 1950\u2019s. Anilox ink was manufactured with \u201caniline\u201d \ndyes which, in the 1950\u2019s, were discovered to be health hazards, so \npigment based inks were developed and have been used ever since. The ink\n carrying roller has continued to be called the \u201canilox roller\u201d even \nthough the aniline dye inks are no longer used for flexography. The \ncurrent inks are very fluid and dry rapidly and are most often water \nbased.<\/p>\n\n\n\n

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<\/strong>Press Types<\/p>\n\n\n\n

Flexographic printing is accomplished on rotary web presses. The \npresses can be divided into three main categories: stack press, in-line \npress, and common impression cylinder press.<\/p>\n\n\n\n

Stack Press:<\/strong> The stack press has separate printing units \nstacked vertically and each printing unit has its own impression \ncylinder. This was the first type of press developed for flexography. It\n is difficult to hold registration between multiple colors printed on \nstretchable substrates using the stack press, even with web tension \ncontrols. It is best suited for heavier gauge substances, such as thick \npaper products, that will not stretch or for applications that do not \nrequire good registration.<\/p>\n\n\n\n

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In-Line Press:<\/strong> Like the stack press, the in-line press has \nseparate printing units for each color and each unit has its own \nimpression cylinder, but they are arranged in a horizontal configuration\n just like a rotary offset press. Because of the distance between the \nprinting units, problems with print registration can occur. Tension \ncontrol equipment is used on the press to hold proper registration \nbetween multiple colors. The wider in-line presses are used for printing\n large items such as corrugated cartons and smaller width webs are used \nfor printing pressure sensitive labels at high speeds.<\/p>\n\n\n\n

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Common Impression Cylinder Press:<\/strong> Instead of the printing \nunits being independent from the others, they are all grouped around a \ncommon impression cylinder. Substrates do not stretch as they move \naround the impression cylinder so the common impression cylinder press \nis a good choice for printing on substrates such as thin plastics that \nwould normally stretch when used on other types of presses. This type of\n press provides for better registration of multiple colors. Some CIC \npresses have impression cylinders that are as much as 8 feet in diameter\n which allows for as many as 8 stations to be placed around the \ncylinder. The only drawback of the CIC press is that they can only print\n on one side of the substrate.<\/p>\n\n\n\n

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Description Flexography is a printing process which utilizes a flexible relief plate that can be adhered to a printing cylinder. It is basically an updated version of letterpress. It much more versatile than letterpress in that it can be used for printing on almost any type of substrate including plastic, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-180","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/dns-iran.com\/index.php\/wp-json\/wp\/v2\/pages\/180","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dns-iran.com\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/dns-iran.com\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/dns-iran.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dns-iran.com\/index.php\/wp-json\/wp\/v2\/comments?post=180"}],"version-history":[{"count":4,"href":"https:\/\/dns-iran.com\/index.php\/wp-json\/wp\/v2\/pages\/180\/revisions"}],"predecessor-version":[{"id":217,"href":"https:\/\/dns-iran.com\/index.php\/wp-json\/wp\/v2\/pages\/180\/revisions\/217"}],"wp:attachment":[{"href":"https:\/\/dns-iran.com\/index.php\/wp-json\/wp\/v2\/media?parent=180"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}