Pancyprian Graphic Arts key terms

A perceptual principle stating that elements placed close together are read as a single group, so spacing alone can signal which items belong together on a poster, label or interface layout.

The deliberate ordering of elements by size, weight, colour and position so the viewer's eye meets the most important message first, then moves through supporting information in a planned sequence.

Unprinted or empty area deliberately left around and between elements. It separates groups, improves legibility and gives a layout breathing room rather than being wasted space.

A circular arrangement of hues used to identify complementary, analogous and triadic relationships, helping a designer choose palettes that are harmonious or intentionally contrasting.

Difference created between type elements through weight, size, case, colour or style. Enough contrast separates headline from body text; too little makes a page look flat and undifferentiated.

All the weights, widths and styles derived from one design, such as light, regular, bold, italic and condensed. Members share skeleton and proportions but differ in stroke treatment.

The single specific design of a set of characters, such as a particular serif or sans serif face, independent of the size or weight in which it is set.

The height of lowercase letters without ascenders or descenders, measured from baseline to the top of the x. A large x-height generally improves legibility at small sizes and on screen.

The vertical distance from one baseline of type to the next. Too tight and lines collide; too loose and lines drift apart, so leading is set relative to type size and measure.

Adjusting the space between individual pairs of characters, such as A and V, so the gap looks optically even rather than mechanically equal.

Uniform adjustment of spacing across a whole run of characters, used to open up small capitals or tighten a headline, unlike kerning which works on single pairs.

Extra image or background colour extending beyond the trim line so that slight misalignment during cutting leaves no white slivers at the edge of the finished piece.

The arrangement of individual pages on a large press sheet so that, once printed, folded and cut, the pages fall in correct reading order in the finished product.

A prepress technique that slightly overlaps adjacent colours so small registration errors during printing do not reveal a hairline gap of unprinted substrate between them.

A setting in which an element prints on top of underlying ink rather than knocking it out, so the two inks combine; used deliberately for trapping or special effects.

The removal of underlying ink beneath an element so only the top colour prints in that area, keeping the colour pure and preventing unwanted ink build-up.

The accurate alignment of successive colour separations or of front and back printing. Poor registration shows as coloured fringes or misaligned images.

The process of converting a full-colour image into the individual ink channels, typically cyan, magenta, yellow and black, that a press will print in succession.

A file describing how a specific device reproduces colour, allowing a colour management system to convert values between devices with predictable, repeatable results.

The rule a colour management system applies when converting between colour spaces, choosing how to handle out-of-gamut colours, such as perceptual or relative colorimetric.

The range of colours a device or colour space can actually reproduce. Colours outside a printer's gamut must be approximated, which is why screen images may not match proofs.

Printing that builds images from four standard inks, cyan, magenta, yellow and black, using halftone dots to create the illusion of continuous tone and many hues.

A pre-mixed ink printed from its own plate rather than built from process inks, chosen for a precise brand colour or for effects process printing cannot reach.

The reproduction of tonal images using dots of varying size on a fixed grid; larger dots print darker areas and smaller dots lighter ones, creating the appearance of continuous tone.

The number of halftone dot lines per unit length, usually expressed in lines per inch or centimetre. Finer rulings hold more detail and suit smoother substrates.

A printing method in which ink transfers from plate to a rubber blanket and then to the substrate, with water keeping non-image areas ink-free.

The controlled application of fountain solution to the offset plate so non-image areas stay ink-repellent while image areas accept ink.

Cutting a shape out of printed material using a steel rule formed into a die, enabling custom outlines, windows and complex packaging blanks.

Pressing a rule into a sheet to compress the material along a fold line, preventing cracking of the coating or board when the piece is folded.

Bending a sheet along a prepared line to form the finished page or package shape; the fold type determines how pages meet at the spine.

A folded sheet or group of sheets that forms a section of a book; several signatures gathered and bound together make the complete volume.

A binding method in which pages are trimmed at the spine, glued into a flexible cover and squared off, typical of paperbacks and thick catalogues.

Binding by stapling wire through the fold of nested sections, used for slim booklets; thickness is limited because the spine edge pushes outward.

The mass of paper per unit area, usually grams per square metre, which indicates weight and stiffness of a sheet and guides choice of stock.

The thickness of a single sheet of paper or board, measured under specified pressure; it affects stiffness, bulk and how a product feels in the hand.

Paper or board with a mineral coating that smooths the surface, giving sharper detail and brighter colour but slower ink absorption than uncoated stock.

The stickiness of an ink, which governs how it transfers and splits between rollers and substrate; excessive tack can pick fibres or cause sheet problems.

Unwanted transfer of wet ink from a printed sheet to the back of the sheet stacked above it, avoided by drying control, spray powder or slip sheets.

The material that receives the printed image, such as paper, board, film or label stock; its absorbency and smoothness strongly affect print result.

Digital production in which text or images change from one copy to the next, allowing personalised mailers, codes or numbered items in a single run.

Artwork defined by mathematical paths rather than pixels, so it scales to any size without loss of edge quality and is preferred for logos and line work.

A picture made of a grid of pixels, each holding colour values; enlarging it beyond its native size reveals visible squares and softens edges.

The amount of detail an image or device can hold, expressed as pixels per inch for images or dots per inch for output devices.

A document supplied with a chemical product that lists its hazards, safe handling, protective measures and first-aid steps, and must be accessible in the workshop.

Carbon-based substances that evaporate readily from inks, cleaners and fountain solutions, contributing to air pollution and requiring ventilation and control measures.

Collecting and distilling used cleaning solvents so they can be reused or safely disposed of instead of being released into drains or the atmosphere.

Extra sheets added to a print run to cover make-ready waste, misprints and finishing losses, so the ordered quantity is delivered complete.

The setting-up work before saleable printing begins, including plate mounting, registration, colour adjustment and achieving correct ink density.

A strip of control patches printed along the sheet edge, measured with a densitometer to check ink density, dot gain and registration during the run.