Silver being a noble metal, is highly resistant to corrosion, but it can be tarnished by sulphides that are always present to some extent in the atmosphere and in many foods - eggs being the most potent. Tarnish consists of a superficial film of silver sulphide. Initially it is a light gold colour, but, with prolonged exposure to sulphides, it can develop into a blue-black discoloration.
To avoid the need for frequent cleaning, it is best to store silver in a box or drawer in a room without a fire of any type and in a lesser used room where available. This avoids exposure to sulphides. To avoid tarnishing by food, rinse it off the cutlery as soon as convenient. DO NOT WASH IN THE DISHWASHER~~~1554~3715~silver,cleaning~
Polishing Powders and PasteOnly use those sold specifically for silver, other products can scratch the silver. Always apply the cleaner with a soft, freshly and thoroughly washed cloth or sponge. Some cleaners in a paste form can contain a tarnish inhibitor. These are particularly useful for holloware products as they are used less frequently then cutlery.
Chemical Dip SolutionsThis is a quicker, easier method of de-tarnishing, especially on heavily embossed designs. The dip solution converts the film of tarnish back to silver by removing the sulphide without removing the silver. However the following precautions must be taken: Never leave the silver plated cutlery in the dip solution for more than 10 seconds. Do not use dip solutions to remove very heavy tarnish as this causes a matt finish. Dip solutions can stain or etch the stainless steel knife blade. If contact occurs rinse off immediately.
Electrolytic MethodsTarnish can be removed from silver by immersing it in a hot solution of washing soda of about 30 grams per 5 litres whilst the cutlery or holloware is in contact with aluminium. Proper kits are available but the process can be carried out on a DIY basis in a plastic bowl with a sheet of aluminium foil laid in the bottom so that the cutlery is in contact with the foil. When the foil eventually darkens and becomes brittle, it becomes ineffective and needs replacing. As in the case of chemical dip solutions, the process is not suitable for use on very heavily tarnished silver upon which it can produce a dull white finish.~~~1554~3714~silver,cleaning~
All tap water contains dissolved mineral salts that would leave an extremely thin film on any article on which it was allowed to dry out without wiping. In most cases, the resultant stain will wipe off, but occasionally more vigorous treatment is needed, using a polishing preparation, such as Solvol's 'Autosol' (available from many motor car accessory shops and some other retail outlets).
Detergents, especially unnecessarily strong solutions of detergent, can leave an indelible rainbow stain on stainless steel if they are not rinsed off and are allowed to dry out on its surface.Very hard water can deposit a chalky film on stainless steel, but this is only likely to occur in dishwashers that use un-softened or incompletely softened water.Very hot grease, fat or meat juices sometimes leave stubborn rainbow coloured stains on stainless steel, but this is more likely to occur on meat dishes than cutlery. Again this does not mean there is anything wrong with the stainless steel, and the articles will be as good as new after the stain has been removed.Heat by itself will impart a rainbow coloured heat tint to stainless steel, but this is only likely to occur if the cutlery is accidentally left on a hot plate or gas burner, when the cause would be immediately obvious.Prolonged immersion in synthetic 'vinegar' (condiment) can stain stainless steel knives if left on for several hours, but more rapidly if the 'vinegar' also contains salt.
Sometimes rust coloured stains occur. Wet fragments of steel wool that find their way onto cutlery may go rusty and leave indelible rust stains on the stainless steel. Other rust coloured stains may come from corrosion pits in the cutlery, although the pits themselves may be so small as to be barely visible.Most stains that resist ordinary rubbing with a soapy cloth can be removed with 'Autosol'. Finally, it must be pointed out that there may be other causes of staining that have not yet been identified.~~~1554~1556~Stains,stainless,steel,cleaning~
Prolonged contact with water us probably responsible for more pitting trouble than anything else. Knives have been made from stainless steel for such a long time that the highly corrosive effect of tap water, caused by the traces of mineral salts it contains is not appreciated. Why then do blades in one establishment last for years without trouble, whilst in others pitting becomes apparent within a few months? The answer lies in the length of time the blades are wet. Knives that are left un-dried or actually immersed in water overnight can receive, in this time, as much exposure to the corrosive effect of water as three or four months' ordinary use, where they are in contact with water for only a few minutes each time they are washed.
Common salt and liquid bleaches or disinfectants are very corrosive and will greatly accelerate the corrosive action of water. Some water softeners are regenerated with salt. If they are not functioning correctly, the softened water can have a high salt content. After adding salt to water softeners in a dishwasher, make certain that it is put through the rinse programme recommended by the supplier before washing knives in the machine. More about Dishwashers plus extensive buyers guides at www.tribaluk.com
Detergents, on the other hand, are normally harmless when fully dissolved - indeed they can often inhibit corrosion by water. If, however, certain powder detergents are allowed to come into contact with blades in hot water before the detergent is fully dissolved, pits and or stains can form within a few minutes. Un-dissolved table salt can have a similar effect.If pitting does occur, a diligent enquiry into the washing procedure is recommended to find out whether the cutlery is left in contact with water for a long time.~~~1554~1557~pits,stainless,steel,cleaning~