Once you've settled on your chosen photo or design, use the simple Lumi App to transform the image into a negative. Print it onto acetate, apply the Inkodye and position your design, then let the sun magically develop it right before your eyes. Just pop it in the wash with the included Inkowash and your print is now permanent and can be machine-washed without fading.

The fun certainly needn't stop at t-shirts either; you can print on cotton, linen, silk, rayon (!!??), canvas, raw leather, suede, or any other natural and absorbent fibre - even untreated wood and unglazed ceramics.
Wish I had seen this at the beginning of the summer

Anyone tried it?