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 non refundable. A formulation for red hair on grays would be using reddish brown alone or mixing reddish brown and golden blonde warm with equal parts developer.
