h�b```f``�g`a`�6`d@ A�r4 9���:\I+``������9w�ͻ U�*��*f�rM�\����~�޹�� Assay marks for silver purity found on German and Polish silver of the 18th & 19th centuries. German hallmarking system was unified in 1888 (see Decree January 7, 1886) adopting the national mark "crescent and crown" indicating in thousandths the fineness of silver.This system is still in use in present days. where appearance is paramount. Parts Insulating Materials  Insulation between heating element and base plate of electric iron. (ii) Insulation used over copper or aluminium conductor used for making coils. Basically there are 4 types of silver in practice, pure silver (999), Britannia (958), Sterling (925) and Coin (80 to 90) percent and sterling silver is most common amongst them. (1) Aluminium (2) Silver (3) Tin (4) Iron, Magnalium is an alloy of (1) Aluminium and Magnesium (2) Magnesium and Tin (3) Aluminium and Zinc (4) Manganese and Magnesium, Electric fuse is an alloy of (1) tin and lead (2) zinc and lead (3) copper and iron (4) carbon and tin, Solder metal is an alloy of (1) lead and tin (2) lead and antimony (3) copper and zinc (4) copper and tin, Solder is an alloy of (1) lead, zinc (2) copper, lead (3) tin, lead (4) sodium, lead, Brass is an alloy of (1) Lead and tin (2) Zinc and copper (3) Antimony, tin and lead (4) Zinc, tin and copper, Bronze is an alloy of (1) Copper and Zinc (2) Tin and Zinc (3) Copper and Tin (4) Iron and Zinc, In galvanization, iron is coated with (1) Copper (2) Zinc (3) Tin (4) Nickel, The most abundant metal in the Earth’s crust is (1) zinc (2) copper (3) aluminium (4) iron, Galvanization is the : (1) deposition of zinc on iron (2) deposition of tin on iron (3) deposition of copper on iron (4) deposition of aluminium on iron, Which metal does not undergo corrosion due to the formation of oxide layer? Also called pure silver, or three nines fine, fine silver contains 99.9% silver, with the balance being trace … Silver is also a tincture in heraldry, but is more usually called argent. Free shipping on many items | Browse your favorite brands | affordable prices. � c��$::�Fu � b9 &�F\�B�]bL�Oin ��1HG�^��н ����������}#��g00��xD��i�)ȩ@�IJL�8 |F;� ҦA� Colloidal silver compounds have been used as topical antiseptics, disinfectants, and germicides. It will not polish to the high shine possible with silver alloys. �\��~�b�.�G#�;�W� �g��݁1C(�rw��]@:���;�R�Y]nz�C*���C~&tbЦ1Kd*%DR�Y����ɤ��vUyǪ�K01{�.��}^\,.�?��x:Vw���e=�Ę4�lʺZ��M큳,��7ܷ�-A)�څ�cR�6�& ��)Q��q�y�%f���fs2_c�U؟��~S��۟����?e��nW�-��q�p�e{1�^�;�8�MoPI�˨H|�@v(f�J �_>g�nr�KI�U�� RlQe 7*)�̕ԅ09� e��2 Noun. Colloidal silver is a suspension of silver particles in a liquid. Commemorative silver 10-mark coins have also been issued which have periodically found their way into circulation. Select insulating materials for following parts : (i) Insulation between heating element and base plate of electric iron. endstream endobj 48 0 obj <> endobj 49 0 obj <> endobj 50 0 obj <>stream Nickel Silver vs. German Silver . Nickel or German “silver” is a white alloy containing copper, zinc, and nickel. In hard-rolled strip form it is used … However, it is soldered the same way as sterling silver and other metals. Silver has the highest electrical conductivity of any element and can therefore used in circuit boards, batteries, generators, transformers, transmission, and any form of wiring that is needed. After an electroplating plant was set up in Birmingham in 1844 German silver was found very suitable as a basis for silver plating. These are the 11 healing properties or benefits of colloidal silver that have been proven by medical literature. It is widely used in the production of coins (e.g. However, silver is very expensive, and thus only has special uses. Silver standards refer to the standards of millesimal fineness for the silver alloy used in the manufacture or crafting of silver objects. This list is organized from highest to lowest millesimal fineness, or purity of the silver. Silver Sterling silver is used for jewellery, silverware, etc. German silver: This silver-colored metal actually contains no silver at all. The word is recorded in Old English (in form seolfor ), and is ultimately of Germanic origin. Unlike other European countries, Germany retained … (1) Nickel (2) Zinc (3) Chromium(4) Lead, Galvanised iron is made by coating iron with (1) Zinc (2) Nickel (3) Chromium (4) Sulphur, The process of covering water pipes made of Iron with Zinc layer to prevent corrosion is called : (1) Zinc plating (2) Alloy formation (3) Vulcanization (4) Galvanization, Stainless steel is usually made by alloying the steel with (1) copper and nickel (2) copper and chromium (3) chromium and nickel (4) manganese and copper, The “King of Metals” is : (1) Gold (2) Silver (3) Iron (4) Aluminium, In silvery paints, the main constituent present is (1) Aluminium powder (2) Silver powder (3) Lead powder (4) White lead, Which of the following imparts a blue colour to glass ? Over copper or aluminium conductor used for jewellery, silverware, etc the is. Is recorded in Old English ( in form seolfor ), and is ultimately of origin! 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