my opinion, is Starbrite reds are highly reactive. scarlet in particular. i myself am sensitive to red, i get little puss bumps in it, no matter the brand, and it heals and the skin stays drier longer than the other colors in the same tattoo. i personally use Eternal, and have had the lowest reactions of all other brands ive used. goes in so much easier too. so, less of that slow healing pink that fades to red later effect. i have a fellow i tattoo w, that swears in 25 years he has never had a reaction w/ unique (perma-pro) in all his years.