Removing Iron Contamination from Paint, Pigments & Inks
Iron contamination causing black specks and discolouration in paint, pigments and inks is removed with an inline magnetic filter on the liquid line, or a magnetic grill for dry pigment powder before mixing. Iron typically enters from mill and grinding equipment wear, or from raw pigment itself — and even a small amount visibly marks the finished product. Below is which equipment fits which stage of your process.
Why It Matters
- Visible product defects — black specks and discolouration from iron contamination are immediately visible, an instant quality failure.
- Batch rejection cost — a contaminated batch of paint, pigment or ink typically can't be corrected, only discarded or reprocessed.
- Colour consistency — even fine iron contamination can shift colour accuracy in precision pigment applications.
Which Equipment Fits Your Line
Magnetic Filter — an inline pipeline filter for liquid paint, ink and pigment slurry, pulling ferrous particles down to 10 microns out of the flow before packaging or the next process stage.
Magnetic Grill — for dry pigment powder before it's mixed into the batch, catching tramp iron at the raw material stage.
Frequently Asked Questions
What causes black specks or discolouration in paint?
Most commonly, iron wear from grinding mill armour and grinding media, or iron contamination already present in raw pigment.
Can this be installed on an existing paint production line?
Yes — a magnetic filter is installed inline on the existing liquid pipeline; tell us your flow rate and pipe size and our engineering team can confirm requirements.
Does this work for both liquid paint and dry pigment powder?
Yes — liquid paint, ink and pigment slurry use an inline Magnetic Filter, while dry pigment powder before mixing uses a Magnetic Grill.
What particle size can be removed from paint or ink?
Down to 10 microns at standard Gauss ratings on the Magnetic Filter, fine enough to prevent visible specking in most formulations.
Seeing black specks or discolouration in your paint, ink or pigment line? Enquire now and our engineering team will size the right solution.