Business Introductions and dealing with clients

How to create an effective introduction 

Imagine a situation where you have two people join you in a conversation, and both of them are of equal seniority; who do you introduce first? 

The card must have a unique finish related to the brand you work for or deal with. It also acts as a trademark in a situation of exchange. Hence choosing a colour that goes with the outline of the colour used in the business. If the relevance to the brand is not present, the card might be remembered as black, glossy, dark and monotonous, especially by people who use business cards for note-taking.