I have made a few shirts for my kids, but they have only been on white t-shirts. I am going on a cruise with a group of friends and we want to make matching fun shirts. They will be red. Do I need to use dark transfer paper or will light ones do? Also, I do not have a boarder or background, only words~ i'm on a boat! Does anyone have ideas on how to make this look nicer. Thanks for your help and advice.