Share 'SP300 Ink Help! Please Look Guys!!!'

Hi guys, I've just bought myself a Roland SP300, I've just started doing my own prints after working out how to use it, however when I've actually came round to printing an image I don't think the image is very good quality. Most colours have horizontal lines all the way across them, I don't think this is very good and wouldn't send this to a customer, do any of you know anything that could cau…