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Printing has an unusual terminology that is attached to it. Below is a small list of terms you might run into when talking with your printer.
Although not totally complete, the glossary below will get you well on your way to understanding your printer and the language that they use.
A bleed occurs when your colour or image extends off of the printed piece, typically bleeds are created when the printed piece is trimmed.
Cyan, Magenta, Yellow and Black are the colours used in 4 colour process printing. On the printing press they are run in a specific order. Black, Cyan, Magenta and Yellow, the most transparent of the four and containing the most varnish in the formula is yellow and is laid down last. The most opaque colour, black, is laid down first. Following this sequence allows for brighter imaging and better control of colour.
The amount of ink printed on the sheet.
A process that bypasses the use of film when creating the image that is receptive to ink on the printing plate.
Impressing an image by forming the paper using a die that is cast in the shape of the image you want to create. When pressure is applied, the paper takes the form of the die.
A sheet of material that is processed with the image on it. This material will be placed over the printing plate and with the use of light, burning the image into the printing plate, determining the ink receptive areas of the plate.
The screening of a continuous tone image, converting the image into different sized, yet, equally spaced dots.
Each time the sheet passes through the press and is printed, it is an impression. The terminology is useful in production scheduling and estimating because it determines the quantity of the run and the efficiency and speed of the press and the operator.
A term that describes the printing of large sized substrates. Printed pieces would include large posters, POS (Point of Sale) signage and banners. The printers that are used are typically inkjet printers.
The printing process that uses a blanket to receive the ink from the plate and then impresses it onto a sheet of paper as the paper passes between the blanket and a hard steel cylinder called an Impression Cylinder.
A type of binding that combines the cover and the inside pages on the spine with glue.
The alignment of dots in relation to each other. When the cyan, magenta, yellow and black plates are aligned and brought into focus, the printed piece is considered to be in register.
A computer language that arranges the dots, solids, lines and type in a particular pattern concerning densities and angles. The function of the RIP is to send instructions to the plate/film processor, telling the processor where to place each item and what angle each item is to be placed in relation to the other items on the film or combination of films used in creating the image.
The binding of a book using wire staples on the binding edge to hold the book together.
A crease that is impressed into the paper. Scoring will allow for exact folding on heavier stocks and helps to eliminate the cracking of some substrates.
In four colour process printing you have a continuous tone image that is separated into four different colours, CMYK, enabling it to be printed. The process begins with scanning an image. The scanned image is then separated into the four process colours. These are processed on plates/film flats with each plate/flat representing a separation.
A printing press that prints individual sheets of paper as opposed to rolls.
Colours that are mixed in batches and are identified by a number. The number can be followed by a C (Coated) or U (Uncoated). The formula is designed for the type of substrate it is to be printed on taking into consideration the porosity of the paper.
The overlay or over printing of dots in relation to each other to compensate for miss-registration on the printing press creating an illusion of tight register.
A printing press that prints rolls of paper.Disclaimer
We are extremely satisfied with the high standard and unrivalled expert knowledge and best practice insight from JPS. They always meet our deadlines (which can sometimes be very tight) without sacrificing exceptional service and quality. We believe the trusted partnership with JPS is a real asset to our organisation.Alyce Simmonds The Royal Hospital for Women Foundation