Lesson plan
Offset ink
Offset ink is a specific type of printing ink used in offset printing, a commercial printing process. Such ink must be specially formulated to resist other chemicals it will come in contact with on the printing press, because the process relies on surface tension. It is widely used for printing high-quality images and text on paper, cardboard, and certain plastics. Offset ink must resist water-in-ink emulsification (i.e., repel rather than absorb water). It needs to have specific physical and chemical properties to work correctly with the dampening solution (also called fount solution ) or silicone coating that covers the non-printing areas of the engraved plate. Offset ink needs to be very rich in pigment so that its full color vibrancy is perceptible, even in minute quantity. Offset ink consists of powdered pigments (organic or inorganic), binders (also called varnish in the trade), additives, and mineral oil as a carrier.
Article summary
Offset ink is a specific type of printing ink used in offset printing, a commercial printing process. Such ink must be specially formulated to resist other chemicals it will come in contact with on the printing press, because the process relies on surface tension. It is widely used for printing high-quality images and text on paper, cardboard, and certain plastics. Offset ink must resist water-in-ink emulsification (i.e., repel rather than absorb water). It needs to have specific physical and chemical properties to work correctly with the dampening solution (also called fount solution ) or silicone coating that covers the non-printing areas of the engraved plate. Offset ink needs to be very rich in pigment so that its full color vibrancy is perceptible, even in minute quantity. Offset ink consists of powdered pigments (organic or inorganic), binders (also called varnish in the trade), additives, and mineral oil as a carrier.
Key claims
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
Bibliography
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Key claims and bibliography are generated from the same tracked claims and sources as the article page.