{"id":816,"date":"2023-08-08T03:14:00","date_gmt":"2023-08-08T03:14:00","guid":{"rendered":"https:\/\/diasinh.com.vn\/?p=816"},"modified":"2023-08-08T03:14:00","modified_gmt":"2023-08-08T03:14:00","slug":"offset-printing-ink-properties","status":"publish","type":"post","link":"https:\/\/diasinh.com.vn\/en\/offset-printing-ink-properties\/","title":{"rendered":"Offset Printing Ink Properties"},"content":{"rendered":"

Opacity or Transparency<\/strong><\/b>\u00a0\u2013 This is the inks ability for light to pass through it.\u00a0 Some printing inks require high opacity \u2013 such as metallic inks, scratch off or mirror inks.\u00a0 This quality depends largely on the type of pigment that is used.\u00a0 This property is also referred to as\u00a0covering power.<\/em>\u00a0Other must be as transparent as possible, such as process colors (cyan, magenta, and yellow). This is to allow a combination of colors to perform various colors of the color<\/p>\n

Permanence\u00a0<\/strong><\/b>\u2013 The ability of an ink to resist fading over time.\u00a0 When the ink is exposed to the elements, it has the tendency to fade.\u00a0 Permanence is a measurement of it\u2019s resistance to this tendency and refers to all elements that could effect it, such as air quality or sunshine. This quality is governed by the lightfastness of the ink.<\/p>\n

Wettability\u00a0<\/strong><\/b>\u2013 This is the ability of the ink to resist discoloring or bleeding when it is exposed to moisture.\u00a0 This is especially important when offset printers make packaging.<\/p>\n

Body<\/strong><\/b>\u00a0\u2013 This is the ink\u2019s consistency, whether it is hard or soft.\u00a0 This can be manipulated by the ink manufacturer, or it can even be influenced by temperature.\u00a0 When offset printing ink gets hot in a running press, it tends to be quite runny which relates more to it\u2019s viscosity.<\/p>\n

Water pickup<\/strong><\/b>\u00a0\u2013 The ability of the printing ink to accept water.\u00a0 When the oil based ink is mixed with water, the ink will accept a certain amount.\u00a0 This is important for running conditions in the offset press. (http:\/\/offsetpressman.blogspot.com\/2011\/02\/water-pickup-values-and-what-it-really.html<\/a>)<\/p>\n

Viscosity<\/strong><\/b>\u00a0\u2013 This describes the degree of the ink\u2019s resistance to flow.\u00a0 Water will flow freely but honey will flow slowly.\u00a0 The difference between the two is their viscosity.\u00a0 This range goes between being very viscous (flowing freely) to very inviscid (flowing freely). This property can vary in offset printing. For example sheetfed presses that use quickset inks tend to be quite viscuous. UV curing inks tend to be quite inviscid. Each has it\u2019s own viscosity reading measured in a unit called a poise.<\/p>\n

Length\u00a0<\/strong><\/b>\u2013 The ability of the ink to form long strings when stretched.\u00a0 The longer the strings are between the ink and the surface that is being lifted, the longer the ink is.\u00a0 This is an important property as it will determine how well the ink will flow through the offset printing press. Inks that are too short (similar to a butter consistency) or undesireable as are long inks.\u00a0 The right value will run smoothly between all the rollers in the offset press.<\/p>\n

Tack<\/strong><\/b>\u00a0\u2013 In simple terms, this is the stickiness of the ink.\u00a0 It is a measurement of the force required to split an ink film.\u00a0 This is important to offset printers.\u00a0 When printing colors in succession, each successive color being printed must be slightly sticker (or higher tack). This is so as to pull the ink off of the printing blanket and onto the successive layer of ink.\u00a0 This is called trapping.\u00a0 Inks will too little tack cannot accomplish this.\u00a0 Inks with tack that is too high wrap up in cylinders of the offset printing press. This happens when the tack exceeds the surface strength of the paper.<\/p>\n

Gloss<\/strong><\/b>\u00a0\u2013 When ink dries, there will be a certain amount of gloss to it\u2019s finish.\u00a0 As a rule, the more porous the paper is the lower the gloss.\u00a0 Therefore coated paper tend to\u00a0 have high gloss inks.\u00a0 This is because the paper will absorb most of the ink vehicle that promotes gloss.\u00a0 Ink manufacturers will sometimes add varnish to their ink formula to enhance the glossy look.<\/p>\n","protected":false},"excerpt":{"rendered":"

Opacity or Transparency\u00a0\u2013 This is the inks ability for light to pass through it.\u00a0 Some printing inks require high opacity \u2013 such as metallic inks, scratch off or mirror inks.\u00a0 This quality depends largely on the type of pigment that is used.\u00a0 This property is also referred to as\u00a0covering power.\u00a0Other must be as transparent as … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":386,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[26],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/diasinh.com.vn\/en\/wp-json\/wp\/v2\/posts\/816"}],"collection":[{"href":"https:\/\/diasinh.com.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/diasinh.com.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/diasinh.com.vn\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/diasinh.com.vn\/en\/wp-json\/wp\/v2\/comments?post=816"}],"version-history":[{"count":1,"href":"https:\/\/diasinh.com.vn\/en\/wp-json\/wp\/v2\/posts\/816\/revisions"}],"predecessor-version":[{"id":817,"href":"https:\/\/diasinh.com.vn\/en\/wp-json\/wp\/v2\/posts\/816\/revisions\/817"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/diasinh.com.vn\/en\/wp-json\/wp\/v2\/media\/386"}],"wp:attachment":[{"href":"https:\/\/diasinh.com.vn\/en\/wp-json\/wp\/v2\/media?parent=816"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/diasinh.com.vn\/en\/wp-json\/wp\/v2\/categories?post=816"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/diasinh.com.vn\/en\/wp-json\/wp\/v2\/tags?post=816"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}