LJ0401W21 is a 25mic Glossy white PET film on a 135gsm white liner, built for laser and LED sheet printers. This page gives you the construction as we actually coat it, where it belongs, and what to pick instead when it does not.
Construction page · last verified 2026-10-19 · published in English · technical questions: contact the lab
PET is a polyester film, and it is specified where paper and BOPP run out of road: higher heat, tighter dimensional tolerance and a firmer, more premium feel. It is dimensionally stable through the press and through the applicator, which is why it holds register on small-format work such as cosmetic and electronics labelling.
Underneath it sits water-based acrylic adhesive. The liner is a paper grade, specified for release and for runnability rather than for printability. The exact grade is on the data sheet.
This construction sits in the Laserjet family, which we build for laser and LED sheet printers. The family grouping is not marketing shorthand — it is how the topcoat is chosen.
| Material code | LJ0401W21 |
|---|---|
| Facestock | 25mic Glossy white PET film |
| Adhesive | Water-based acrylic adhesive |
| Liner | 135gsm white liner |
| Print platform | Laserjet |
| Series | Glossy White PET |
| Supply form | Jumbo roll, slit roll — sheeted on request |
A water-based acrylic system is the default when the job does not call for anything exotic: it prints well, converts cleanly and keeps the odour profile low compared with solvent systems.
Where the printed label sits close to the consumer, or the converter runs a tight plant with limited extraction, a water-based adhesive is usually the easier conversation with the customer.
One adhesive system across a paper and a film facestock keeps a multi-SKU programme simple to specify, stock and convert.
Prolonged water contact sits outside the design envelope of a standard water-based acrylic.
Oil on the surface prevents the adhesive from wetting out; test before running production.
PET costs more than a paper facestock. It earns that premium in heat resistance, dimensional stability and a premium feel — not on a commodity carton label.
The Glossy White PET series holds 1 constructions in our catalogue. They share the same facestock family, so the differences that matter are adhesive system and liner — and those two decide which jobs each code wins.
| Code | Facestock | Adhesive | Liner |
|---|---|---|---|
| LJ0401W21 | 25mic Glossy white PET film | Water-based acrylic adhesive | 135gsm white liner |
Buyers often ask the reverse question: the construction works, but the press changes. These are the codes in other families built on the same facestock type.
| Family | Code | Facestock | Adhesive |
|---|---|---|---|
| UV Inkjet | UV0501W21 | 80mic Glossy silver PET film | 21 ± 3 mic — adhesive coat weight; system confirmed on the TDS |
| UV Inkjet | UV0507W21 | 50mic UV Inkjet Glossy Silver PET Film | Water-based acrylic adhesive |
| UV Inkjet | UV0601W21 | 75mic Matte silver PET film | 21±3 mic (ISO 2808) — adhesive coat weight; system confirmed on the TDS |
| UV Inkjet | UV0607W21 | 50mic UV Inkjet Matte Silver PET Film | Water-based acrylic adhesive |
Answered from the construction data, not from a brochure.
Why the topcoat, not the film, decides whether a digital print looks right.
The full Laserjet family with the interactive filter.
All 62 published constructions side by side, filterable by press and material.
How the 115 constructions are organised, and which family fits your press.