Transmission fluid additive in the hydraulic system

This is a question senor westend, not a comment or a critique of your response...

Is not extremely fine emery cloth referred to as "crocus cloth"? I would like to re-learn this as I have projects that would love to see "fine emery cloth" and wish to know for sure if the term "crocus cloth" would succinctly define what I need to a hardware store employee north of the border.