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Page 2 of 3 Four-Colour Process
The most common system for producing full colour print. The four ink colours are Cyan (blue), Magenta (red), Yellow and Black - often referred to as CMYK. The inks can be overprinted and combined in a variety of different proportions to produce a wide range of colours.
Full Colour Printing
See ‘ Four-Colour Process’
GSM
Abbreviation for ‘grams per square metre’. This indicates the weight of paper or other stock. For example a typical photocopier paper is 80gsm, a good letterhead paper might be 120 gsm, a postcard would be about 300gsm.
Laid Paper
Uncoated paper often used for business stationery which has a textured pattern of parallel lines similar to hand made paper. Compare to Wove Paper.
Lamination
A plastic film bonded by heat and pressure to a printed sheet for protection. Available in matt or gloss finish. Micron
Although paper is usually measured in grams per square metre (weight), it is sometimes measured in microns (thickness). A micron is unit of measure equal to one millionth of a metre or .00004".
Pantone
Pantone, Pantone Matching System and PMS + are Pantone Inc’s industry-standard trademarks for colour standards, colour data, colour reproduction and colour reproduction materials, and other colour related products and services, meeting its specifications, control and quality requirements.
Paper Sizes
The most common system of paper sizes in Europe is the ISO standard. Most people are familiar with the A series which includes A4 the usual letterhead size:
A0 - 841 x 1189mm
A1 - 594 x 841mm
A2 - 420 x 594mm
A3 - 297 x 420mm
A4 - 210 x 297mm
A5 - 148 x 210mm
A6 - 105 x 148mm
The C series is for envelopes - a C4 envelope being ideal for holding an A4 sheet. There is also a B series which provides intermediate sizes for the A series but this is rarely used.
The other series which you may come across is SRA which is used by printers. It is slightly larger than the A series to provide for grip, trim and bleed:
SRA0 - 900 x 1280mm
SRA1 - 640 x 900mm
SRA2 - 450 x 640mm
SRA3 - 320 x 450mm
SRA4 - 225 x 320mm
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