Cooksongold Help CentreAnswer
Aug 15, 2023 - 08:00 AM
This depends on how often and how much it is worked with.
However, after a certain period of time, the solution can be tested on a few parts to confirm whether the start-up protection is still intact or not.
Functioning test of tarnish protection
Material and equipment
- 4% potassium sulphide solution, newly prepared
- Glass jar
- Plastic pair of tweezers
- Stopwatch
Procedure
- The glass jar is filled with 4% potassium sulphide solution.
- The object to be tested is immersed into the potassium sulphide solution in the glass jar with the plastic pair of tweezers at room temperature.
- Goods which have been treated with a newly made-up Anti-tarnish bath CRF+ should discolour 3 min later at the earliest.
Longer times without tarnishing indicate an even better quality of the tarnish protection. For comparison an untreated object should be tested.
WARNING: Potassium sulphide must be handled with care. Hydrogen sulphide is toxic, also in low concentrations.
All safety measures required for working with chemicals have to be followed. Transferability of this test to other anti-tarnish systems must be checked by the user.
