NOTAR Ag-1090

INTRODUCTION

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.

HIGHLIGHTS

• 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.

DIRECTIONS

• Preparation of aqueous solution
  1. Concentrate – warm up NOTAR Ag-1090 concentrate to 30~40°C (recommended in water bath), and keep stirring until it appears uniformly transparent.
  2. Aqueous solution – add 1% (0.2%~5%) concentrate in warm water around 50~60°C.
• Preparation of the work piece
  1. 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.
  2. Rinse in water
• Anti-tarnishing process
  1. Immersion
     1. Temperature – keep the solution around 45°C~60°C
     2. Time of immersion –
     • 30s (10s~120s) for barrel/rack
     • 5s (2s~10s) for reel-to-reel
     3. Agitation – slow agitation promotes performance
     4. Filtration – not recommended
  2. Cold rinse – in static deionized water at room temperature
  3. Warm rinse – in flowing deionized water at 60°C
  4. Dry – blow off with warm air up to max. 120°C
• Remarks
  • 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.

STORAGE

• Should be sealed and stored in a cool dry place away from direct sunlight