
1) Print the image you want;
2) Buy carbon white paper to be used in tissue;
3) The obvious thing to be done haha;
4) If the tissue is dark in color, you need to first pass the white paint. After the white paint adhere the tissue you can paint over with the color you want, red or yellow as in the examples.

Details: Use as a surface support within the shirt. If you paint a piece unintentionally, do not worry. Use a toothbrush with water to clearing. Good luck, do it yourself!
Everyone already knew that? I hope I have taught something new =z