Iron Shadow is nowhere to be found, as pure as it was at the beginning

Even the smallest iron impurities are a flaw in quality.
We adopt a high-gradient magnetic separation and exclusive chelation capture dual processes, locking in PPM-level iron filings in one second and reducing the iron content to 0.003% in a single batch.
No production stoppage or secondary residue is required, allowing the raw material to regain its original whiteness and transparency.
Leave the iron to the machines, and keep the purity for yourself.