Jewelry Investment Powder of HK-20

Features: 1 The casting mold can bear temperature as high as 830oC(1526oF) 850oC(1562oF), and has high thermal shock resistance. It can be used in precision casting of noble metal with melting temperature under 1300oC 2 The investment contains oxidation-resisting microcrystals. It prevents casting surface from oxidizing during high temperature melting metal pouring in. 3 Applicable in up to 14karat gold added high temperature alloy (such as palladium), silver alloy superior line of jewelry casting. 4 Mold cavity duplicates are highly clear and accurate; the casting surface is extremely smooth, no any male-female face. 5 Automatically collapsed when dip into water, easy to pattern drawing. Model: HK-20 Water/Powder Ratio: 38-40:100 Working Time: 9-10 min Initial Set Time: 12-15 min Thermal Expansion @730: 0.72% Setting Expansion @2hrs.: 0.50% Thermal Compressive strength (730×1hrs): 0.71 MPa Setting Compressive strength (2hrs.): 1.30 MPa Max.Burnout Temp.: 830(1,526°F)