Spec sheets translate marketing claims into measurable values, and the fields that matter are rarely the ones printed largest.
We pay particular attention to 50x30mm small product labels, small-format tags for cosmetics, accessories and dense shelf arrangements, because it is exactly the kind of specification that separates engineered labels from generic spot stock. The intended payoff is sharp identity on the smallest packs. As a manufacturer with its own factory and processing lines, Xinwei controls the variables that decide whether that payoff actually reaches warehouse and rugged field scanners.
- Check core and winding direction on every custom specification
- Reserve barcode quiet zones before fixing label dimensions
- Keep two or three adhesive grades rather than one generic compromise
- Review the program quarterly against scan-fail and jam data
- Demand batch codes that trace rolls to coating and converting runs
- List every printer model, its core size, sensor type and winding direction
- Choose the face: standard top-coated paper, heavy-duty paper or PP/BOPP film
- Ask whether coating, slitting and die-cutting run in the supplier's own factory
Q: Which label size should I choose?
Start from the encoded data, reserve barcode quiet zones, add text lines, then check the shape against the product and the limits of the printer. Standards such as 4x6 inch (100x150mm), 60x40mm and 50x30mm cover most needs; a real factory cuts custom dies quickly when standard sizes do not fit.
Q: Are BPA-free thermal labels available?
Yes. BPA-free developer formulations are standard options from serious manufacturers, and stricter programs can specify phenol-free (also BPS-free) chemistry. Always request a written declaration against your restricted-substance list matched to the exact converted product.
Q: How do I calibrate a new roll on my printer?
Load the web, run media calibration for gap or black-mark sensing, print at default darkness, then adjust until verification grades best without bleed, and lock the setting. Consistent die gaps and slit quality mean calibration is done once per printer model rather than every carton.
Q: Do thermal labels work on plastic, glass and textured surfaces?
They do when adhesive and facestock match the surface: conformable faces for curves, high-tack films for textured HDPE and woven sacks, and clean surfaces at the right application temperature. The surface triangle of material, temperature and time must be solved deliberately.
Q: Can I order custom sizes and die shapes?
Yes, from a manufacturer with in-house converting. Custom widths, lengths, circles, ovals and special silhouettes are cut on rotary tooling; after a dimensioned sample is approved, the tooling is retained so repeats run like standards.