JC HIGH NOBLE YELLOW TYPE 3 CROWN & BRIDGE ALLOY JC was one of the first alloys developed by Jensen Dental more than 35 years ago. A high noble, yellow crown and bridge alloy, JC is perfect for most cast-gold restorative work including single and partial crowns, onlays, and short-span bridges. JC offers a stunning 18 carat yellow color and is well known by industry professionals to be a strong alloy that melts, casts, finishes and polishes with ease and accuracy. PROPERTIES Melting Range Grain Size Tensile Elongation Contains less than 1% Zinc, Indium, Iridium Tensile Yield Strength Ultimate Tensile Strength Classification - High Noble PROCESSING TECHNIQUE SPRUING The indirect method is recommended for multi-units. Use an 8 gauge runner bar with 10 gauge connectors. If preferred, the direct method may be used on both single units and small bridges. Use a 10 gauge sprue 1/4” (6mm) to 3/8” (9mm) long. Sprues longer than 3/8” (9mm) should have a reservoir 1/16” (1.5mm) from pattern. Patterns should be a maximum of 1/4” (6mm) from top of investment. Either gypsum or phosphate bonded investment may be used following the manufacturer’s instructions. The burnout temperature should be at least 900ºF (480ºC) and should not exceed 1200ºF (650ºC). Extra winds of the casting arm are not required. A gas/compressed air or gas/oxygen flame with 5 psi gas and 10 psi oxygen is recommended. The alloy will fully puddle and form a ball before it is ready to cast. The casting temperature is 1850ºF (1010ºC). Bench cool to a dull red heat before quenching. Blast with aluminum oxide to remove investment particles and oxidation. Finish and polish using standard techniques. Solder: 650 Fine Solder Flux: Brown Fluoride Flux Jensen Industries, Inc. 50 Stillman Road North Haven, CT 06473 USA Jensen GmbH Gustav – Werner Str. 1 D-72555 Metzingen Freecall: 0800-8 57 32 30 [email protected] www.jensendental.de Jensen Technical Service is available 8:00 AM - 8:00 PM EST by ca