Most label complaints — curling, tearing, illegible barcodes, lifted corners — come from a paper face used where a synthetic was needed. This page gives the decision criteria and the cost consequences.
Property comparison
| Property | Paper | Synthetic (PP / PET) |
|---|---|---|
| Material cost | Lower | Higher |
| Water resistance | Poor (wet-strength: fair) | Excellent |
| Oil and chemical resistance | Poor | Good to excellent |
| Tear resistance | Low | High |
| Conformability to curves | Fair | Excellent (PP) |
| Print sharpness | Excellent | Very good (top-coated) |
| Cold / freezer | Poor | Excellent |
| Recyclability in fibre stream | Compatible | Not compatible |
| Clear / no-label look | Not possible | Yes |
| Face thickness / weight | 60–80 gsm (about 70–90 µm) | 50–85 µm PP, 23–50 µm PET |
| Service temperature | −10 °C to 60 °C | −40 °C to 120 °C (PET) |
| Material cost index | 100 (baseline) | 160–260 |
Decide by environment
- Dry ambient retail, short shelf life: paper.
- Chilled or condensing surfaces: wet-strength paper or synthetic.
- Freezer, wash-down, outdoor or industrial: synthetic.
- Squeezable bottles and tight curves: PP synthetic for conformability.
- No-label look on glass or PET: clear BOPP or PET.
- Fibre-stream recyclability is a stated requirement: paper, with a compatible adhesive.
Total cost, not material cost
A synthetic face typically costs more per square metre, but that comparison ignores failure cost. A label that curls in a chilled cabinet triggers rework, complaints and reprints — usually far more than the material premium across the run. Conversely, specifying a synthetic for a dry ambient carton is money spent on durability the pack will never use.
Frequently asked questions
When should I choose a synthetic label face instead of paper?
- Whenever the pack sees water, condensation, oils, abrasion, freezing or outdoor exposure, or where the label must conform to a squeezable or tightly curved container. For dry ambient packaging with a short shelf life, paper is the better value.
Is a synthetic label waterproof?
- The face is; the construction is only as good as its adhesive. Pair a PP or PET face with a permanent adhesive rated for wet or cold application, because most wet-condition failures are adhesive failures rather than face failures.
Do synthetic labels print as well as paper?
- Top-coated PP and PET print very close to paper for both flexo and thermal transfer. Uncoated synthetics do not accept ink or thermal transfer reliably, so always specify a top-coated grade for printed work.
Which face is better for recyclability?
- Paper, when the pack goes into a fibre recycling stream and the adhesive is compatible. On PET or HDPE containers, a matching-polymer synthetic label can actually be better for the container's own recycling stream, so the answer depends on which stream the pack enters.
What is wet-strength paper?
- Paper treated to retain tear and edge strength when wet. It is the middle option for chilled and condensing applications: much cheaper than synthetic, far more durable than standard paper, but not suitable for prolonged immersion or wash-down.