Potters Modelling Red Clay is perfect for beginners, school projects, and arts and crafts. This versatile clay allows easy hand-moulding and offers the option to air-dry ensuring a hassle-free, user-friendly process or vitrify for enhanced durability. When vitrified, the objects become safe for outdoor use, dishwasher-friendly, and suitable for serving food. Wet to dry shrinkage 5-7% and around 13% when fired. Fired colour variable with temperature. If the clay has been left out of the bag for a few days and has become a little firm it can be dropped from waist height a number of times to soften the clay and bring it back to life.