Thanks for taking the time to look all that up. I def dont like the Surya. I bought it once and it is just taking a long time polish off. I have cassia. Indigo and henna so Im going to experiment. My original plan starting henna was once a month but My hair is growing so fast. Had to go to two weeks. I only get grays in the top front. I dread when I start having to touch up roots all over my head.