What makes a clarifying shampoo a clarifier?

[God's Anointed]

Ok, i know that since i use SLS free shampoos that i need to clarify every month or so. So it got me to thinking, what makes a clarifying shampoo a clarifier? Is it the fact that it says clarifier on the bottle? Or is there a specific ingredient that makes it a clarifier? I was ready this article on http://thebeautybrains.com/2009/03/02/how-do-clarifying-shampoos-work/ , and it got me thinking that maybe it's just the sulfates that "clarify" your hair. In that case, wouldn't many of our shampoos be "clarifiers" erplexed? Ladies, if my logic is wrong, please tell me what ingredient exactly should i look for in a clarifying shampoo?

 

[God's Anointed]

Come on ladies, help me out here!!!

 

[melissa-bee]

There was a list of specific ingredients somewhere. Let me see if i can find it.