I hope I am posting in the correct area and not breaking the rules with my first post. I am currently studying HVAC-R-- working towards a 2 year degree and working in the field at the same time. A long time ago I saw a post put out by one of the refrigerant companies that showed all the major refrigerants their compositions if they were blends and what applications they were for, like high med. or low temp refrigeration of air conditioning. It had the bottles and their colors I dont have access to that poster anymore and was wondering if anyone knew who put out such a poster, or if its available online it is really convenient for learning.