Carmi has a tutorial in this magazine.  It highlights making ATCs with fabric or paper using a sewing machine.  You can see this in her clippings section online.

 

 

 

Artist trading cards, also known as ATCs, are 2 ½ x 3 ½ inch (64 x 89 mm) miniature works of art which artists trade with one another, similar to the way people trade sports cards. They can be any medium: pencil, watercolor, acrylic, oil, collage, scratch board, mixed media - anything the creative mind of the artist can think up. Artist Trading Cards are produced as originals, as limited editions, or as a series.

ATC's have been around almost as long as art has. They were very popular in the 16th century, when men would have portraits of their mistresses painted on small cards. They were also given often by families when they arranged marriages between chidren.

In the mid 1700's the English began using them as advertising.

ATC's have always been used by artists, especially during the Impressionist years, to trade with their fellow artists so they could study each others techniques.

Conceptually ATCs are about exchanging art without the interface of the art world and without money being involved. Artists trade their cards in face-to-face trading sessions as well as via mail. Artists who trade by mail often make their arrangements online and/or through e-mail. In some ATC artists' opinions, trading cards by mail is a diminished experience when compared to an ATC Trading Session.