A vector graphic stores the colours, dimensions, shapes and lines of an image as a mathematical formula. The reason why a mathematical formula is used is because it allows you to produce the highest quality of image possible and it can also help to determine where the pixels should be placed in order to give you the best results when the image is on the screen.
In this format, the image can then be scaled to almost any size with any level of detail. This means that when the image is enlarged, you get a clear picture without experiencing blur. With a standard image, when you resize it, you may find that it distorts and in some cases it may even be unusable. When you have a vector image however, you could put it on a piece of stationery or a huge billboard outside your home and the two would be identical in terms of quality and vibrancy.
So when it comes to screen printing, a vector file format is really important and you may be surprised at what a difference it can make to your business and the end result of printed products. After all, vector gives you the best results and at the highest level of quality and if something is going to be seen by the public with your name on it, this is something that you want to guarantee.
For print and production, acceptable vector file types are .ai, .eps & .pdf and any fonts should be outlined. The .svg file format is increasingly popular within the digital media world for use on websites and video editing.