طين اسود ناعم عالي الحرق إسباني
سهل التشكيل ليونه جميله عاليه يناسب العجله والبناء اليدوي
طين مثالي اللون جميل في درجات الحرق مع القليزات الصخريه يظهر لون القليزات بشكل انيق وبراق.
طين يستحق التجربه…..!
Black stoneware clay with 40 % extrafine grog 0-0.2 mm (up to 80 Mesh). Formulated for artistic ceramics, it is ideal for wheel-throwing and modelling smooth pieces with fine details. The high content of grog confers an excellent behaviour during drying and firing. Its beautiful and intense black firing colour in oxidising atmosphere is very exclusive of PRN range and becomes an ideal artistic mean of expression. In reducing atmosphere, metallic effects with shades of blue are obtained. Suitable for tableware (food-safe), according to ISO 6486. Available in extruded body (moist form).
Firing range*: 1200-1240 ºC / Cone 5½-7
Biscuit temperature: 1000 ºC / Cone 06
Water content: 21 %
Plasticity (IP Atterberg): 19
Carbonate content (CaCO3): 0 %
Drying shrinkage: 8.2 %
Firing shrinkage 1240 ºC: 5.4 %
Porosity (water absorption) 1240 ºC: 4.0 %
Dry bending strength: 5.9 N/mm2
Fired bending strength 1240 ºC: 51.4 N/mm2
Thermal coefficient 1240 ºC (25-500 ºC): 63.8x10^-7 ºC^-1
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