Grain | Grain direction is the orientation of fibres with respect to the long edge |
| of the paper. For example, in an A4 sheet, the fibres of a long grain |
| sheet are parallel to the 297 mm dimension of the page (the pages of a |
| short grain sheet are parallel to the 210 mm dimension). |
Graininess | Weak image (on an offset print) with a granular look caused by ink |
| becoming waterlogged and caked. |
Grammage | The weight in grams of one square metre of paper (abbreviated to gsm). |
Grey balance | The mix of cyan, magenta, yellow and black that produces a neutral grey |
| across the tonal range. |
Gripper margin | The 10 mm lead edge of the sheet that is rendered unprintable by |
| grippers (the row of clips that holds a sheet of paper as it moves |
| through an offset press). |
gsm | The weight in grams of one square metre of paper. Also called |
| grammage. |
Gutter | The blank space, or inner margin, from the printing area to the binding. |
Halftone | A continuous tone image that has been reproduced with groups of small |
| dots. |
Halftone screen | To produce continuous tone images on a printing device, the image must |
| be broken down into a series of dots of various sizes and colours, called |
| a halftone screen. |
Halo | The result when a dark coloured object knocks out a coloured |
| background that is composed of more than 30 to 70% of one toner |
| colour on a xerographic printer. |
Hickey | A recurring, unplanned spot appearing on an offset printed image |
| caused by dust, lint, dried ink or paper stuck to the blanket. |
Highlight | The lightest area in an image or photograph. |
Hue | The name of colour, such as green, blue, purple or orange. One of the |
| three characteristics that describe colour (along with saturation and |
| value). |
ICC | Short for International Colour Consortium. An industry body that has |
| been set up to create a common framework for colour management. |
ICC profile | A file that describes how a particular device (eg, printer, display or |
| scanner) reproduces colour (ie, its gamut or colour space). |
ICM | Short for Image Colour Matching. The colour management framework |
| that is used in the Windows environment. ICC profiles in the Windows |
| environment have a .icm extension. |
Imposition | The positioning of individual pages on a signature (or press sheet) so |
| that after printing, folding and cutting, all pages will appear in the |
| proper sequence. |
DocuColor 2000 series design guide
G – 6 
