did you look at the label on the canvas? Usually it'll say what it's suitable for. Sounds like you've bought one for acrylics and oils. Water colour canvas would be best for what you're trying to achieve
Battik is textiles no? On material?
either a metallicy or white arcylic water proof substance that you draw onto material with, making sure that there are no gaps in the lines, then fill in the gaps in the lines with ink.
Or am I thinking of sometimes else..
*presses the 'art geek mode' off button*