Twelve grams per square meter of microporous PE is roughly the weight of a single tissue. Try printing eight colors on it at 500 meters per minute, with cross-direction register tighter than a millimeter, without tearing it.
That is the job our W&H MIRAFLEX II handles in production every day.
Why 12 gsm is hard
Thin breathable films stretch unevenly. They register-shift. They tear at the pinch points. They distort under heat in the dryer. None of these are theoretical — they're what every operator has lived through on every flexo press built before about 2015.
What the MIRAFLEX II changes
- Central-impression geometry — the substrate is held against a single, water-cooled central drum at every print station. That removes nine of the ten places where a thinner web normally distorts.
- Closed-loop register — automatic pre-register and on-press correction at full speed.
- GEW UV/IR dryers — heat profile tuned so the dryer doesn't soften the microvoid structure that gives the film its breathability.
- Solvent-free water-based inks — no occupational solvent exposure for our operators, no recovery overhead, no VOC story to manage for the brand owner.
What we can do today
Eight colors. Five-hundred meters per minute. Twelve gsm minimum substrate. CD and MD registered repeats. Random patterns. Custom landing zones for tape closures. Anti-counterfeit serialization.
When a brand owner walks in with a full-bleed brand graphic and asks "can you print this on our backsheet at line speed?" — the answer is almost always yes.