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Holtby’s finest Silvering Powder
Gosport (023) 9252 5665
“ We have been making this high grade Silvering Powder for the Horological Trade for over 30 years and it is still claimed to be one of the best on the market. We do not ‘bulk-out’ with excessive salt or cut-down on the silver we use as the market prices on silver fluctuate. We have maintained the same, original recipe which has been passed down through our family to the next generation of Horologist and we still maintain the same high standards as we did at the beginning of this ever growing family business.”
This product is especially designed for the restoration & re-silvering of clock & barometer dials.
WARNING:- Contains traces of acid. Sensitive skin users should wear gloves. All users must wash hands afterwards. Keep away from food & drink. Always thoroughly clean work surfaces afterwards. Never work in sunlight/outside or place container in bright daylight as it discolours the powder but does not harm it’s effectiveness. Store in a cool, dark place. Keep dry.
1/ Thoroughly clean the dial, removing the old surface lacquer, silvering & tarnishing by wet-and-dry paper under gently running water. Take care not to deeply score the dial by using too coarse a grade paper or over polishing by too fine. A continuous circular motion around the dial of an even pressure is best to produce the silky finish required. Never overwork this as you must not get to the point where you are removing the brass underneath the old lacquer or rounding the crispness of the engraving. Keep the dial wet and proceed straight to the next stage.
If wax replacement is required: – Thoroughly dry the dial by plunging into very hot (hand hot water) for a couple of minutes before removing & quickly drying with very dry tea-towels. The hot water process aids rapid drying. Professionally wax as usual. Repeat the process above (enough just to remove unwanted wax only) then proceed to the second stage below:-
2/ Have the required amount of silver on a saucer ( roughly 2 to 3 heaped teaspoons) keeping the storage container dry, with the lid on & out of direct sun. Add only a few drops of water to make a paste then apply as required to the dial with your fingers or with a damp cloth (minimum 3 teaspoons of powder will be required if charging a cloth) and rub into the damp surface of the dial with a circular movement. Don’t drown the dial or paste in water as you’ll wash away the silver contained in the powder. If this should happen simply add more powder. Work your way round, working quickly until an even silver effect is achieved. Should the dial become too dry – add a little more water during the process. Rinse the dial under warm water. Proceed straight to stage 3
– DO NOT LEAVE THE DAIL COLD & WET ONCE THE SILVER IS ADDED-
3/ Charge a clean damp cotton rag or wad with a generous amount of Finishing Powder. Go over the whole surface (whilst still damp from process 2) until a fine , even silver finish has been achieved. Rinse in very hot water (as hot as you can bear) to aid rapid drying. Quickly dry with at least two very dry tea-towels (changing each one as it becomes damp) then air dry for awhile on a radiator or sunny window sill (do not be tempted to ‘cook’ the dial in the oven or with a hot hair dryer) DO NOT TOUCH THE DIAL SURFACE.
4/ It is not uncommon for the odd brown streak to appear (the air-drying is to give it time for these to appear before lacquering/waxing). This is due to fine pitting or some other way unseen moisture has remained on the dial – just the tiniest amount of moisture will cause this. To remove the ‘browning’ simply rub dry finishing powder on with dry cotton wool over the dial. Then rub off the access with a generous clean wad of cotton wool to prevent bare hands touching the surface. Don’t worry if there still appears to be a ‘white-bloom’ on the wax numerals or dial (it will disappear once lacquered). Professionally lacquer (or top quality wax if preferred) the dial as usual, using specialist horological products only.
Finest Silvering Powder :- Trade size (500g) – £41. 00 .
Small trade size (200g) £19.50
Silver Finishing Powder :- Trade size (500g) – £11.40
Small trade size (200g) £7.00
U.K. Postage from £4.98 per shipment.
Hobby & occasional restorers can purchase our smaller 100g Silver & Finishing Powder Kits from our retailer, The Honiton Clock Clinic using the link or telephone 01404 47466
Supplied length for a single fusee train in an 8 day movement. no less than 4′ 11″ – no more than 5′ 3″.
In some cases, shortening the wire may be required but easy to do so by simply ‘tinning’ the section to be cut with soft solder.