This is the Old Formula, if you are looking for the previous formula, this is it... that is the packaging as posted. Wella Color Charm Demi Permanent is gentle to hair and scalp – Long-lasting, brilliant color results – This product is designed and intended for use by a licensed beauty professional. See inside packaging for details. Ratio is 1:2 (1 part color and 2 part developer) Note: This listing does not include developer. It’s a long lasting results, Deposit only, no lift, 20 minute process time and Immediate use after chemical services. Using Wella colorcharm Demi-Permanent Color Mix 1 part (2oz.) Wella colorcharm Demi-Permanent to 2 parts (4oz.) Wella colorcharm Developer in a non-metal bowl or bottle. Apply color mixture starting at the roots, thoroughly distributing through lengths and ends. Let the color develop for 20 minutes without heat. Rinse the color out of the hair until water runs clear, shampoo and condition.