If you design your artwork at 72dpi or lower you will get poor quality slightly blurred printing. NOTE: You can not improve the quality of images already saved at 72 dpi. (If you open an image that has already been saved at 72 dpi, and increase its resolution to 300 dpi and resave it, the quailty will NOT be improved… You must start with good quality original 300 dpi images.
If you have an image that is say 180 dpi or larger you may get acceptable quality but it will not be as good as 300 dip image.
If you place a 72 dpi image in your artwork and reduce its size to 25% of the original. It will print ok.