Water soluble extra-strength anti-tarnish agent for silver
NOTAR Ag-1090 is a post-treatment anti-tarnish agent for silver metal. It forms a thin transparent protective layer on top of the silver surface to effectively slow down tarnishing. As a result, the original appearance of the silver metal will be preserved for a prolonged period.
- Wide range of applications – suitable for electrical products and all kinds of decorative applications.
- Eco-friendly – highly soluble in water and free from CFSs, CHCs, HCs and chromium.
- Simple to use – immersion suitable for high-speed continuous process
- Low friction – good sliding properties
- Surface properties preserved – contact resistance, solderability, bondability
- Invisible – silver appearance remains.
- Effective – passes most sulfide corrosion tests.
- Preparation of aqueous solution
- Concentrate – warm up NOTAR Ag-1090 concentrate to 30~40°C (recommended in water bath), and keep stirring until it appears uniformly transparent.
- Aqueous solution – add 1% (0.2%~5%) concentrate in warm water around 50~60°C.
- Preparation of the work piece
- Cleaning – make sure the silver surface is free of grease and oxidation layer. dGRIS BA-20 from PhilChem is an excellent degreasing agent. Tacklean 8000 from PhilChem is a safe neutral oxide remover.
- Rinse in water
- Anti-tarnishing process
- Temperature – keep the solution around 45°C~60°C
- Time of immersion –
- 30s (10s~120s) for barrel/rack
- 5s (2s~10s) for reel-to-reel
- Agitation – slow agitation promotes performance
- Filtration – not recommended
- Cold rinse – in static deionized water at room temperature
- Warm rinse – in flowing deionized water at 60°C
- Dry – blow off with warm air up to max. 120°C
- The dilution rate of the aqueous solution of NOTAR Ag-1090 can be adjusted by the customer; usually the lower the dilution rate, the better the protection.
- The dipping time can also be adjusted; the longer the dipping time, the better the protection.
- Should be sealed and stored in a cool dry place away from direct sunlight