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For screwdown crown pendant tubes with an internal spline Ø3
especially for various hot
Steel Ruler (Bergeon 2819-08-C)
Lined and Calibrated Shaft A-Z
Boric Acid Powder 1 kg Tub Darkfield Loupe For screwdown crown pendant tubesA traditional favourite with Jobbing Repairer Jewellers and Silversmiths How to prepare and use Clean the piece as you would before soldering and assembling. Mix with 1 litre of methylated spirits and 150g of Boric acid in a glass or polyurethane container, with a lid. Depending on the size of the piece, cover it entirely by dipping or brushing on a fine coating. Heat all over with a torch to form white coloured skin; this creates a protective barrier
