Mehta Distributors Palace Road, Rajkot, Gujarat

We are offering sp 154 master alloys for white gold. Composition (wt. %) : ag 20, ni 17, cu 48, zn + deoxidizers – bal. Carat : 10 - 14 colour : white melting temp of alloy : 940c application: the alloy sp 154 is a versatile product as it is usable from 10 to 14 carat and for both hand-made and investment cast jewelry. It imparts the desired softness, smooth surface finish and porosity-free finished product. An ideal composition for “invisible” diamond jewelry. recommended practice: 10k 14k application : casting casting alloying temp. : 1040c - 1060c 1050c - 1070c casting temp. : 1020c - 1040c 1030c - 1050c flask temp. [normal cast] : 630c - 660c 630c - 640c flask temp. [stone cast] : 600c - 620c 600c - 620c quenching time : 20 - 25 minutes. 20 - 25 minutes • cast tree cleaning & drying procedure: after primary removal of the investment during quenching, submerge tree in a hot (80-100oc) 50% phosphoric acid solution for 15-20 minutes. Rinse well with cool water to remove remaining investment powder and base metal oxides. Dry with compressed air. • for reusing the castings we recommend 60% fresh carat gold with 40% castings. • for cold working handmade operations it is suggested that after heating to annealing temp(650oc to 750oc) the item should be allowed to cool in air, and not recommended to quench in water.

We are offering oxygen free copper. Spangle oxygen free copper specially used in jewelry making industries. Our ofc is contain 0.05% oxygen. As well is is fire stain for 650 degree. It is good for lowering melting loss in gold jewelry.

We are offering master alloys for gold. master alloys for carat gold & silver jewellery ================================================== alloy code :- sp 141 composition (wt. %) : ag 23, cu 66, zn + deoxidizers bal. Carat : 10 - 14 color : american yellow melting temp of alloy : 890 c application: the alloy sp 141 is the most widely used alloy for diamond set jewelry. It imparts yellow color that is very popular in export market. It is usable from 10 to 14 carat investment cast jewelry. It ensures smooth surface finish and porosity-free finished products. Reusability of the castings is also very satisfactory. Recommended practice: 10k 14k application : casting casting h-made alloying temp. : 1010c - 1020c 1030c - 1040c casting temp. : 980c - 1000c 1010c - 1030c flask temp. [normal cast] : 620c - 640c 620c - 640c flask temp. [stone cast] : 580c - 620c 580c - 620c quenching time : 15 - 20 minutes. 15 - 20 minutes notes: â�¢ the actual casting temperatures and flask temperatures shall be decided by the parameters like the section thickness of the items (thick, medium or thin), the overall sizebulk of the cast tree, the design intricacies etc. Â�¢ as a thumb rule, for thinner sections higher temperatures are selected and for thicker sections lower temperatures are preferred. At the same time, designs demanding higher form filling capabilities, higher than normal temperatures are an obvious choice. Â�¢ cast tree cleaning & drying procedure: after primary removal of the investment during quenching, submerge tree in a hot (80-100oc) 50% phosphoric acid solution for 15-20 minutes. Rinse well with cool water to remove remaining

Composition (Wt. %) : Ag 23, Cu 65, Zn + Deoxidizers- BAL. Carat : 18 - 22 Colour : Indian Yellow Melting Temp of Alloy : 890 Ce. Application: The alloy SP 181 is the most widely used alloy for diamond jewelry. It imparts right set of properties which helps artisans to achieve firm diamond setting. It also gives a color which is popular for 18 carat diamond studded Indian jewelry. Recommended Practice: 18K 22K Application : Casting H-made Casting H-made Alloying Temp. : 1040C - 1060C 1060C - 1080C Casting Temp. : 1020C - 1050C 1050C - 1070C Flask Temp. [Normal Cast] : 630C - 650C 640C - 660C Flask Temp. [Stone Cast] : 610C - 630C 620C - 640C Quenching Time : 10 - 15 minutes. 15 - 25 minutes Notes: 1) The 18 carat casings have a tendency to get hardened and subsequently give problems of cracking especially when flasks are cooled very slowly. For this reason, it is recommended that the flasks are cooled as fast as permitted by the quality of diamonds and also by the design parameters. 2) Pre-Alloying is strongly recommended simply to ensure better homogeneity in castings as well as in hand made products. Also, for still better results, pre-alloying in an inert atmosphere is always preferred. 4) Cast Tree Cleaning & Drying procedure: After primary removal of the investment during quenching, submerge tree in a hot (80-100oC) 50% phosphoric acid solution for 15-20 minutes. Rinse well with cool water to remove remaining investment powder and base metal oxides. Dry with compressed air.

sp 505 is ready to cast brass alloys for imitation. this alloys help you to reduce weight of your product because it density is very high. also give great yellow color before gold plating. this alloy is 100% reusable so no metal losses and you can get 100% production.