What is leed and egistration black?
Bleed is a safeguard. It’s when you take an image or background over the crop marks of a document, so that when it’s trimmed after being printed, the colour or image goes right to the edge. If you don’t have bleed, then you run the risk of tiny slivers of white paper showing along your edges – as the printer might crop a millimetre out. Usually 3 mm bleed is sufficient. Registration black is a black that is made up of all 4 colours (CMYK). Usually all trim and perforation marks are selected in registration black. This is so that the marks show up on all four pieces of film. Most page layout programs have ‘Registration’ as a colour in the default colour menu.
