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The Portable document format (PDF) also includes a spot color called All, with the same restrictions, starting with PDF 1.2. Note that a PDF spot color must also include a "tint transform" which translates spot values into a different color space for viewing on screen, or printing to printers without spot color support. There is no special rule ...
Black is the most common ink color used for printing books, newspapers and documents, as it provides the highest contrast with white paper and thus is the easiest color to read. Similarly, black text on a white screen is the most common format used on computer screens. [9]
Security printing is the field of the printing industry that deals with the printing of items such as banknotes, cheques, passports, tamper-evident labels, security tapes, product authentication, stock certificates, postage stamps, and identity cards. The main goal of security printing is to prevent forgery, tampering, or counterfeiting.
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Invisible ink, also known as security ink or sympathetic ink, is a substance used for writing, which is invisible either on application or soon thereafter, and can later be made visible by some means, such as heat or ultraviolet light. Invisible ink is one form of steganography.
A shortcoming of gravure is that all images, including type and "solids," are actually printed as dots, and unless the ink and substrate combination is set up to allow solid areas to flow together, the screen pattern of these dots can be visible to the naked eye. Gravure is an industrial printing process capable of consistent high quality printing.
This ink is made with soot from burning particular woods, bound with animal glue, and the method of application results in a greenish black color in the skin. [ 36 ] In the Māori tattoo practice, tā moko , tattoo experts have made ink from the ashes of resinous tree parts (such as kauri gum ) or caterpillar fungus , mixed with oil from plants.
After the image is drawn onto one of these surfaces, the image is gummed-up with a gum arabic solution and weak nitric acid to protect the remaining surface before inking up the image with oil based transfer or printing ink. Before final printing, the image is proof printed and any errors corrected. In the direct form of printing, the inked ...
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