UltraDose Jewelry Cleaner Powder is now available in a 10-lb. size. Developed for use in ultrasonic machines, UltraDose restores the sparkle and brilliance to diamonds, gold, precious metals, and gemstones. Packaged for high-volume users, the new 10-lb. size can make up to 160 gallons of cleaner. L&R Manufacturing Co., 577 Elm St., P.O. Box 607, Kearny, NJ 07032-0607; (201) 991-5330.

The LaserGold Model JL 15 Jewelry Laser for precious metal chain manufacturing from Gold International Machinery Corp. enables automatic welding of chain links directly on the chain-making machine with minimal heat stress on the parts welded, no lost material, and no joining metal, according to the company. Among the chains that can be produced are cable and curb chains (single, double, triple, etc.), rope chains, and Singapore pendant chains, in gold, silver, and platinum wire up to 0.30 mm diameter at up to 300 links per minute. Gold International Machinery Corp. P.O. Box 998, Pawtucket, RI 02862-0998; (800) 619-GOLD or (401) 724-3200, fax (401) 728-5770, www.goldmach.com.

Rio Grande?s exclusive Sunshine polishing cloths are packaged in bulk for use by manufacturers, designers/craftspeople, and retailers as well as in single pouches for resale. The cloths, which remove skin oils and tarnish, are impregnated with nonscratching microabrasives and a chemical cleansing agent. They are made of a dry, smooth nonstaining material that polishes precious metal, brass, copper, chrome, and finished jewelry as well as showcases, countertops, and mirrors. Bulk-use packs are available in quantities of 10 and 100. Rio Grande, 7500 Bluewater Rd., N.W., Albuquerque, NM 87121-1962; (800) 545-6566 (from the United States) or (800) 253-9738 (from Canada), fax (800) 965-2329, www.riogrande.com.