Amaco Permoplast Modeling Clay Foundations Opaque with excellent translucency

with excellent translucency

slower drying (thus better brushability)

68 kg  Imifabi Talc60 grams Soda Ash16 fl oz    Sodium Silicate40 liters   Water

the expansion factor is exactly the opposite

Bentonite can also be used as a glaze thickener in small amounts and can also be used to thicken glazes if you do not want to use an organic compound (such as CMC or Gum Arabic)

Amaco Permoplast Modeling Clay Foundations Opaque with excellent translucencyFor more than seventy years, Permoplast has remained the standard for first quality, non hardening, plastic modeling clay. This medium is ready to use and is available in gray and cream colours. Permoplast remains smooth and pliable and retains its plasticity indefinitely. Cream is especially formulated for industrial use in making molds. Sulfur free.