Shop here for Amaco mid-range clays. While these clays all do great at mid-range firings -- cone 5 -- they also all work great as low-fire clays, too! If you are a classroom teacher working with a range of students and projects, consider Amaco mid-range clays for this very reason. Your younger students can make work that will be single-fired, while more advanced students can take advantage of the clays’ higher firing range for the creation of functional wares.