Amtech

Top Amtech flux is a knock off. The bottom is genuine.

Our favourite flux.

But there are so many knock offs. How to find out if you have a real one?

1. The real flux costs around 25USD / £20 or more.
2. The real flux does not have Chinses writing and hologram on it
3. If you shine UV light on the rea one, it will react to it, and shine bright.
4. The real Amtech flux flows more creamy, where as the fake one is more chunky.
   

   Top Amtech flux is a knock off. The bottom is genuine.

Other article to note:

https://www.eevblog.com/forum/chat/is-this-amtech-flux-i-bought-genuine/

https://www.microsoldering.com/amtech-nc-559-flux-fake-versus-real/