Types of paper
It is important to know the differences between papers as the type of paper finish will effect the final results, e.g., printing on uncoated paper will produce different results to that of a coated paper.
This is a paper with a rough fibrous surface such as letterhead or copier paper. Because it has no coating ink is absorbed by the fibrous surface. This means that colours often appear darker and duller that they appear on coated materials. Uncoated papers and boards are available in a range of weights and has a significantly slower drying time.
This is the most common paper used for leaflets, brochures and magazines. It is available as a silk or a gloss finish and is often not as white as uncoated paper. It has a very smooth surface as a result of the chalky coating. Definition and colour are better as the ink sits on the surface and does not spread into the fibres. Silk paper usually needs sealing.
Weights of paper
Paper weight is generally measured in grams per square metre (gsm), which has no bearing on the actual thickness of the sheet. For example coated papers which have been compacted during the application of the coating are less bulky than uncoated papers despite being the same weight. This is an important detail when producing larger multiple page documents as the chosen paper could end up too thick to saddle stitch.
Heavier weight boards are often measure by thickness, which is given in microns (thousandths of a mm).