Thank you for your always support .
I've got a information that our customer Shinwa Echo have some plating trouble last week.
Please see attached photo.
That is filtrate residue after zinc powder process.
Judging from the color, there is some possibility of including Fe.
However, our ICP didn't detect any Fe.
For your reference , 3ppm detected at DIPSOL lab.
In addition, there is also no detection of Fe about sample of 7th Nov though 6.6 ppm detected at Dipsol.
I'm sorry to trouble you but please check ICP analysis procedure .