I have come across a problem some members of my scrapbooking group have experienced and we think we may have a solution that other people may be interested in trying. The problem is white writing or print on black cardstock backgrounds i don't know of any printer that will do this effectively so I decided to experiment. Purchase an old fashioned "Mapping Pen", the sort with a tiny steel nib these are only a few dollars in most newsagencies. Now for the white part: mix white acrylic or poster paint to the consistency of thin cream (not too thin or it will just soak into the cardboard and dip your pen into it, wipe off excess paint and start writing.
you will need to let this dry .This looks particularly effective if you do cursive writing.