Offset printing technology | Offset lithography

Offset printing technology is preferred method for printing materials providing lower per-unit costs with the quality for larger print runs.

offset printing technology

graphic diagram of deinking — The ability to deink paper – in other words, to separate ink and coatings from it – is crucial for sustainable recycling of it. Good deinkability is a prerequisite for using used paper to make graphical papers and hygienic paper products. Effective processes are available today for removing aqueous coatings […]

Deinking of Paper

11/10/2011 in offset printing inks tagged deinking of paper / offset inks / offset printing inks / offset printing technology by vlad682000

eco printing inks — Some of the pigments used in ink contain metallic substances which are harmful to human health and the environment such as cadmium, chromium, lead and mercury. Conventional printing inks are petroleum – based and used with alcohol-based solvents. As alcohol and petroleum evaporate Volatile Organic Compounds (VOCs) are emitted. VOCs […]

Ecological Printing – Inks and Coatings

11/10/2011 in offset printing inks tagged Ecological Printing - Inks and Coatings / offset inks / offset printing inks / offset printing technology by vlad682000

color saturation — Problem:Solids appear to lack density Cause: Improper ink/water balance Improper concentration of fountain solution Non-uniform dampening Loss of image area Improperly set form rollers Solution: Adjust to proper ink/water balance Adjust fountain solution to proper pH/conductivity (pH 4.0-4.5) Clean brushes, flicker blades, etc; replace if necessary Adjust form rollers to […]

Color Too Weak

07/10/2011 in troubleshooting tagged cmyk rollers / color saturation / offset plates / offset printing / offset printing technology by vlad682000

plate blinding or wear — Problem:Part or all of image on plate does not take ink. Cause: Fountain solution too acidic Excessive gum in fountain solution Plate cleaners and/or scratch removers have dried on plate image Fountain system contaminated by detergent Excessive fountain solution in ink Improperly developed plates; gum adheres to image area […]

Plate Blinding Chemical

07/10/2011 in troubleshooting tagged offset plates / offset printing / offset printing inks / offset printing technology / plate blinding chemical by vlad682000

The Ink Roller Train — The ink roller train consists of an ink fountain with ink keys, an ink distribution blade and roller, a ductor roller and alternating hard and soft distribution rollers. Proper ink distribution begins at the ink fountain. If the blade is nicked, the roller surface scored or pitted, or the fountain […]

The Ink Roller Train

05/10/2011 in sheet feed offset printing tagged cmyk rollers / Ink Roller / offset inks / offset printing / offset printing inks / offset printing technology by vlad682000

Color Bar — Density is the level of darkness in a negative or positive film or print. The measurement of density is called densitometry. An instrument called a densitometer is used to measure the density. Any printing process from the most simple black and white work to complex color work will benefit from […]

Densitometer in Offset Printing Process

05/10/2011 in sheet feed offset printing tagged Densitometer / offset printing / offset printing technology / Reflection densitometer / Transmission densitometer / x-rite by vlad682000

painting colors wheel — If you look on a basic color wheel you will see that he is separated on 12 parts (colors): primary, secondary and tertiary colors and their variations in brightness. With Red on top circle of color consists of three primary colors: Red, Yellow and Blue. Those three colors close triangle […]

BASIC COLOR WHEEL

29/09/2011 in offset printing inks tagged basic color wheel / offset printing / offset printing inks / offset printing technology by vlad682000

rhopoint tri gloss meter — The gloss is always dependent on the printing stock and coating. If measurements are compared, it is necessary to pay attention to the measurement angle. A gloss measurement with a measurement angle of 60° is generally customary. Values range from 0 to 100 gloss points If gloss measurement doesn’t always […]

Gloss Measurement in Offset printing

29/09/2011 in troubleshooting tagged Gloss Measurement / offset printing / offset printing technology by vlad682000

influence on electrostatic charge on printing paper — Offset printers know very well what this problem represents: printing sheets stick together because they are electro-statically charged. This condition may result in feeder trip-offs, print voids from surface contamination, ink offset, or poor sheet jog in the delivery. Static electricity arises from either an electron deficit (positive charge) or […]

How Electrostatic Charge Affects Offset Printing Quality

29/09/2011 in troubleshooting tagged electrostatic charge on paper / offset paper / offset printing / offset printing technology / offset troubelshooting by vlad682000

Color bar used for control of ink in offset printing — Print Control Strips in offset printing are used to help printer controlling color through whole process of printing and at the end we have a quality printed product. This control strips are usually put across the edge of the printed sheet containing various test elements for each of the four […]

Maximizing Quality in Offset Printing

20/09/2011 in Offset printing tagged color / control strips / offset inks / offset plate / offset printing / offset printing inks / offset printing technology / printing color strips / registration marks by vlad682000