offset printing technology

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

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

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

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

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

istick 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) […]

Electrostatic Charge on Paper

Print Control Strips in offset printing are used to help printer controlling color thru 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 colors. […]

Print Control Strips