MJ0401W21 is a 75mic Glossy white PET film on a 80gsm Glassine Liner, built for Memjet-based inkjet presses and print engines. 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 permanent acrylic adhesive. The liner is a glassine — a supercalendered paper with a dense, closed surface. Glassine releases cleanly at high converting speeds, it is the cheapest liner that does the job, and it is the default for roll-fed work.
This construction sits in the Memjet family, which we build for Memjet-based inkjet presses and print engines. The family grouping is not marketing shorthand — it is how the topcoat is chosen.
| Material code | MJ0401W21 |
|---|---|
| Facestock | 75mic Glossy white PET film |
| Adhesive | Water-based permanent acrylic adhesive |
| Liner | 80gsm Glassine Liner |
| Print platform | Memjet |
| 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.
Memjet engines fire a very wide page-width array at high speed, which puts two demands on the facestock that other inkjet platforms do not: the coating has to dry fast enough that the print can be rewound immediately, and it has to be uniform across the full width, because a page-width head shows up any variation as a band rather than as a small defect.
Constructions in this family are coated and finished for that profile. If you are running a Memjet engine and the print looks weak, the conversation is usually about the topcoat rather than the film.
The Glossy White PET series holds 2 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 |
|---|---|---|---|
| MJ0401W21 | 75mic Glossy white PET film | Water-based permanent acrylic adhesive | 80gsm Glassine Liner |
| MJ0402W21 | 80mic Glossy white PET film | Water-based acrylic adhesive | 80gsm white glassine paper |
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.
What the liner contributes to release, converting speed and moisture tolerance.
Why the topcoat, not the film, decides whether a digital print looks right.
The full Memjet 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.