For a free allergy test send a self addressed stamped envelope with $1.50 postage to receive a sample for an allergy patch test. Be sure to include the request for the color you wish to try. Send the self addressed envelope inside of an envelope addressed to: Ecocolors Inc. 4760 Hammermill Rd #106 Atlanta GA 30084 The self addressed envelope should be a small manilla type envelope about 4 inches by 8 inches.(larger than a legal size envelope) This way you can see if you are allergic before you order since all orders are nonrefundable and allergies are not to be taken lightly. EcoColors is NOT a "cure all" for all sensitivities. Golden blonde warm is ppd free. If you are not allergic to this shade, it will make your grays blonde. However, the henna needs to completely be gone before you can use EcoColors. When the henna is completely gone, be sure to leave the color on your resistant grays for 45 minutes with a cap. Then shampoo and condition.