Single Color
Single Color images are created black and white then output to a printing plate. Plates don't know color, think of them like a base 2 system, on or off, 0 or 1, the plate only knows ink goes here or ink is ignored here. The plate is mounted on the press which is filled with any color of ink we want to use. Single color includes solid text or screens (lighter shades of the original color). If you look closely at the image you will notice the screens are actually small dots. By reducing the size and spacing of the dots the color appears lighter. A single color image can be as basic as black ink on white paper or more involved such as gold ink on a coated ivory stock.
Multi/Spot Color
Spot Color images are usually 2-4 colors. There are 2 ways of separating colors: spot and CMYK. For files that we create from scratch we use spot, which means every color is assigned based on a PMS ink color. Basic pc programs that the average person uses do not allow this option. We work around this by converting the colors to cyan, magenta, yellow or black. By doing this we are able to separate the colors to separate plates.
Process Color
Process Color or Full Color printing is using the four ink colors of cyan, magenta, yellow and black (CMYK) to create all colors. The colors are created by printing groupings of small dots. By varying the amound of individual color in each grouping, the four colors are perceived by the eye as a rainbow of colors.
Digital Color
Digital Color is output on a toner based laser printer. Digital Color is used when the quantity is small or the turnaround is shorter than necessary for the press. While speed and no quantity restrictions are a plus, a downside to Digital Color is the lower durability. In situations where the image will be slightly heated or compressed the toner softens and can transfer to whatever it is pressed against. Most common you notice this problem in mailed letters where the bottom half of the sheet that was folded ends up with a reversed copy of the image.