Using expired ink comes with the following hazards:
First, poor print quality.
Using expired ink can cause faded colors, inaccurate color reproduction, a grainy appearance in the image, and even ink breaks or ink misting, making the finished product completely unusable.
Second, serious equipment damage.
Sediment from expired ink clogs the ink tubes and filters, then wears down the printhead. Cleaning is very difficult, and the cost of repairing or replacing the printhead is far higher than the cost of the ink itself.
Third, increased risk of malfunctions.
The poor flowability of the ink leads to inconsistent ink supply, which can trigger printer errors and shutdowns, affecting production efficiency.
Generally speaking, imported UV inks have a shelf life of about one year, with better-quality ones lasting around 18 months. Domestic UV inks generally have a shelf life of about one year, while white ink typically only lasts about six months. Therefore, try not to use expired ink. Throw it away immediately — don't risk a big loss for a small saving.