Tea leaf adulteration is not always visible to the naked eye. The FSSAI has shared two simple tests you can conduct at home to detect the possible presence of iron fillings and artificial colouring.
The tea powder you use could be contaminated with iron filings. Tea powder may have some iron filings present in it because of the way it is processed.
As per Tea Board Of India, tea leaves that get damaged during manufacturing process are often treated with various colouring agents to improve their appearance and price.
