White refractory paste PRAF

White refractory paste with 40% fine chamotte 0-0.5 mm. Designed for artistic ceramics, it is ideal for sculpture, construction pieces and Raku pieces. The high chamotte content gives character to the ceramic piece and provides it with excellent behavior during drying and firing. Its particular ivory white color when fired is highly appreciated and provides the excellent base for color development in enamels and coloring oxides. Also known as “Rafael” pasta, it is very popular for its exceptional performance in Raku.

 

Cooking temperature: 1240-1300ºC
Cake temperature: 1000ºC
Humidity: 17%
Plasticity (IP Atterberg): 16
Calcimetry (CaCO3): 0%
Drying shrinkage: 5.4%
Firing shrinkage 1300ºC: 4.6%
Porosity (water absorption) 1300ºC: 4.1%
Dry mechanical resistance: 2.4 N/mm2
Mechanical resistance cooked at 1300ºC: 33.5 N/mm2
Expansion coefficient 1250ºC (25-500ºC): 59.8x10^-7ºC^-1