I tried the Kozo heavy & Cot-320 with Kallitypes; and am pleased with both. The Cot-320 had excellent detail but the Kozo heavy also had very good detail. I did have problems getting an even coating even with tween; so will try double-coating the next sheet. It (Kozo heavy) did hold up well despite all the baths necessary for Kallitypes - I'm very impressed with it.