One color printing means that your design contains only one ink color. Grayscale designs, which contain a wide range of spaced tones ranging from black to white through intermediate shades of gray, are also considered one-color printing.
Two Color Printing
Two-color printing means that your design contains two different ink colors. Your 2 chosen colors can be combined to create a wide variety of hues.
Four Color Printing
Designs that contain more than two colors require an ink process called full-color printing, which is also known as CMYK (Cyan, Magenta, Yellow and Key). These four ink colors can be combined to print an endless variety of colors.
I normally do not send out digital proofs. That way I can keep my costs down and the turn-around time fairly fast! Since I take the information as it is typed in the "note to seller" and copy/paste it into my program and then make adjustments for typestyle (all lowercase, all uppercase, etc.), there usually aren't any problems with not sending out proofs.
If you still would like to see a proof, please let me know in the "note to seller" box upon checkout. Please note that this may delay production by a day or two.