More often than not, a customer will supply you with artwork that depicts the image exactly as they want it to be printed on the shirt.
That is, a white (or other colored) image on a black background. Keep in mind that we are talking about strictly a one color (or grayscale photo) print on a black shirt.
To convert an image like this into a camera ready film positive is very easy.
In this "how-to" tutorial by CorelDrawTips.com, you will learn how to convert a low resolution bitmap logo to a vector logo using CorelDraw. Vectorizing a logo is necessary so that the logo will look sharp and crisp and will not be pixelated even when enlarging it. A bitmap to vector conversion is an essential skill for creating "camera-ready" art for screen printing or sign making.
ASPA Staff and others