American Art Pottery Association
The American Art Pottery Association was established in 1983, and seeks to promote an interest, understanding, appreciation, and recognition of American Art Pottery. The association strives to unify and strengthen the voice of collectors and dealers of American Pottery, while fostering a members' Code of Ethics for buying, selling, exhibiting and publishing about American Art Pottery.
I've been using Koh-I-Noor Rapidograph Technical Pens since 1969. My aunt bought me my first set when I was 12 and I have used them daily ever since. I love the fact that I can mix my ink colors to match my watercolor or my wardrobe and use "Pelikan Drawing Ink A" almost exclusively. Though the inks made by Koh-I-Noor and Winsor Newton are satisfactory.
If you are a beginner, I would NOT recommend purchasing anything smaller than an 0 (0.35 mm). Even as a professional I find cleaning a 4x0 to be a challenge. I work most often with a 2x0, and find them to produce the smoothest flow, if kept clean.