What ink is used for offset lithography?
What ink is used for offset lithography?
The most commonly used ink is black, followed by the other three ‘process’ colours – cyan, magenta and yellow (CMYK).
How does offset lithographic printing work?
Offset lithography works on the principle of oil and water separation. When water and ink are applied by the rollers to the plate, the oil-based ink sticks to the image while water sticking to the non-image area repels it. Some offset printing presses use a silicone layer that repels ink instead of water.
What is lithographic print?
Lithography is a planographic printmaking process in which a design is drawn onto a flat stone (or prepared metal plate, usually zinc or aluminum) and affixed by means of a chemical reaction.
What is coldset ink?
A type of printing ink comprising a resin-wax vehicle that is a solid at room temperature, and must be melted in order to be printed. Heated ink rollers, form rollers, and plates keep the ink melted long enough to print, where the ink hardens upon contact with the cool paper.
What are lithographic crayons made of?
Lithographic crayons are made of beef tallow, Marcel soap, soot (carbon black), beeswax, shellac, etc. When these tallow and soap ingredients are applied to the plate, they bind with the metal and adsorb onto the surface, producing a sensitized area which repels moisture.
What chemicals are used in offset printing?
The system uses the same types of chemicals throughout to achieve a system compatible throughout. The plate coating comprises deionized water, citric acid, sodium phosphate dibasic, gum arabic, magnesium nitrate solution, glycerine, and propyl alcohol.
What is offset lithography ink made of?
Like all printing inks, offset lithography ink consists of three substances: The ink vehicle is the fluid part of the ink that transports the pigment onto the substrate. The pigment is the part of the ink that imparts gloss, color, texture, and other characteristics to the printed image. Various additives influence the characteristics of the ink.
Do you need special equipment for offset lithography?
Most offset inks dry rapidly without the need for additional equipment, but there are also inks optimized for infrared, ultraviolet or electron beam curing. All offset inks contains water-repellent materials, needed because offset lithography is based on the fact that oil and water do not mix.
What is the difference between offset printing and inkjet printing?
Offset commercial printing presses and inkjet desktop printers both use four basic ink colors: CMYK. Where inkjet printing puts all the different ink colors on the paper in one pass through the printer, in offset printing each color of ink is applied separately – one plate per color.
Why choose our lithographic inks?
The performance and value of our lithographic products is complemented by unmatched systems and technical support enabling our customers to succeed. These inks are everything today’s marketers want in metal packaging: eye-catching looks from high strength, abrasion-resistant inks that offer excellent adhesion and superior fabrication properties.
