I did some myself too. You use SILK ties (I got some from DI) and boil it in vinegar and water. The pattern transfers to the egg. Pretty cool huh? It has to be 100% silk though and if you get any creases when you wrap it the egg stays white in the creases, as you can see on my eggs. But hey, this was my first time ever doing it. I think it turned out cool!
Here are the eggs wrapped in silk then cotton. Boiled and tada: The first pattern was a little light. You can see where it's blurry or white spots that the tie fabric overlapped or didn't get direct contact to the egg.