Having only used pure chalk without added substances so far, I wondered how the other types perform. Most of the information I could find online is either somebody ranting against a certain type, or uncritical explanations of what the different ones are made of.
So, what are the benefits and tradeoffs of each type of chalk? How long do they last on the hands, how much climbing do you get per amount of chalk? So I can base value on the price I can get for these products when it's time to buy.
Is there really something that makes you feel like you've got sticky fingers like some people suggest?