| 1 | GS1-128 quiet zones | Leave a clear, unprinted area at least 10 times the narrowest bar width (10X) on both the left and right sides of the barcode. | Measure the blank space from the outermost bar to nearby text, borders, graphics, or other printed marks. |
| 2 | Label material | Choose a face material compatible with the surface and environment, such as paper for many indoor uses or synthetic material where greater moisture or abrasion resistance is needed. | Test adhesion and print quality on the actual package or product surface under expected handling conditions. |
| 3 | Direct thermal or thermal transfer | Use direct thermal labels when short-term image life is suitable. Consider thermal transfer when the application needs a more durable printed image and a compatible ribbon. | Confirm printer compatibility and test the printed label for fading, smearing, and abrasion over the required service life. |
| 4 | Printer resolution | Match the printer’s resolution to the barcode’s narrowest elements and the available label space. Common thermal printer resolutions include 203, 300, and 600 dpi. | Print at the intended size and confirm that narrow bars and spaces remain distinct and the symbol scans reliably. |
| 5 | Label size and layout | Choose a label wide and tall enough for the required barcode, human-readable information, and quiet zones without compressing or cropping the symbol. | Check the complete printed layout at actual size, including margins, placement, and any required text. |
| 6 | Adhesive performance | Select an adhesive suited to the surface, application temperature, and required permanence. Adhesion can differ on cardboard, plastics, and curved or textured surfaces. | Apply sample labels to representative surfaces and check edge lift, sliding, and removal behavior after application. |
| 7 | Environmental exposure | Consider exposure to heat, cold, moisture, sunlight, chemicals, and friction when choosing both the label material and printing method. | Evaluate samples under the actual storage, transport, and use conditions expected for the labeled item. |
| 8 | Barcode data and scaling | Generate the GS1-128 symbol from validated data and preserve its proportions. Do not stretch, squash, crop, or add design elements inside its bars and spaces. | Confirm the encoded data and application identifiers, then inspect the symbol after printing at its final size. |
| 9 | Print quality verification | Use a barcode verifier when print quality must be measured; linear barcode verification commonly follows ISO/IEC 15416. | Set acceptance criteria with the applicable GS1 requirements and the receiving or trading-partner specification. |
| 10 | Production testing | Test labels using the intended printer, media, ribbon if applicable, print settings, and application process before committing to a production run. | Scan samples from the beginning, middle, and end of a run and confirm consistent placement, legibility, and quiet zones. |