I have made Mehendi Designing machine last year. And developing it into product. Will reach the market soon.

There is a patent on it. Search in Google Patents : WO2016108193A1. I am still working on it to make a DIY Mehandi Printer "Mehandi Rob".

3D Printing + Image Processing could make it done. A Mehandi Printer. Through out the above comments and queries, its a long time dat sprouted dat idea. Now its feasible....