Noticed this recently on my tube of flux that shipped with the machine. Was already super dubious about it’s origins (It had huge MADE IN USA labeling on it, and yet shipped from China.)
Abit of searching online led me to this site.
Where the poster had bought on DX (DealExtreme) and Ebay, flux of dubious origins and confirmed with Amtech that there were indeed not original products.
Here’s a couple of photos of mine.
Notice the mis-spelt Colifomia.
While RMA-223 is just a type name, rosin mildly activated, EN 29454-1 type 2.2.3. I don’t like the fact that they are trying to use Amtech’s name to get it to sell.
It’s bloody cheap on Ebay and DX too, like $2 for 1 tube, while the real stuff is usually 10x pricier, so I guess you get what you pay for.
As for the flux performance, I actually find it surprisingly good, better then the rest of the stuff I have on hand at the moment, very little moisture content (low bubbling when heated), adequate tackiness for my reballing applications and good wettability, I haven’t got the real stuff to compare against, so I can’t tell you if it performs the same. It’s not a no-clean formulation so you have to clean it off, I have found that it leaves a whitish residue that may screw up your high frequency stuff, but my cleaning solvents (IPA and/or limonene based cleaner) works real good on this.
The problem though is consistency, there is no date stamped on the tube and I don’t suppose the QC is even existent, so no idea if the next tube will perform the same as this one. If I ever get another tube just to find out. I’ll post more information.