Lab168-429-3 roll photo (page image, visually verified 2026-09-21)
T429 matte white PET polyester · freezer flat-surface labeling
Lab168-429-3 · 20 × 15 mm two-column die-cut cryogenic freezer labels
Small square-format cryogenic labels on a 20 mm web, two-column die-cut; a single label covers the full tube face of a cryovial, and the roll feeds continuously in two columns, with a 3 mm overlap at both ends for freezer flat-surface labeling.
T429 PET polyester20 × 15 mmTwo-column die-cut-196 °C LN₂500–1000 labels/roll
Product Overview
Lab168-429-3 cryogenic freezer labels use T429 matte white PET polyester as the face stock and are laboratory labels for labeling freezer flat surfaces and cryovial tube faces in temperature environments from -196 °C LN₂ to 121 °C autoclaving.Nominal format 20 × 15 mm, aspect ratio approximately 4:3, laid out in two-column die-cut: when the roll is fed, two adjacent columns are formed simultaneously, and a single 20 × 15 mm square label fills the front-facing visible area of the mid-section of a 2 mL cryovial body, so the tube can hold a short sample ID or a short barcode without a second label.
Face stock and temperature resistance follow the T429 row of the official material guide: matte white PET polyester film, officially described as "the ideal choice for labeling freezer flat surfaces," passing all four tiers: -196 °C LN₂, -80 °C freezer, 100 °C hot water, and 121 °C autoclaving. The official application checkboxes are cryovials/test tubes and packaging labeling—so beyond tube labeling, the same roll can also be used for category labeling of cryogenic packaging and shipping outer boxes.
The key usage point for T429 is stated in the official rules: when applied to a frozen tube face, overlap at least 3 mm at both ends. The 20 × 15 mm square format has a slight surplus when wrapped once around a cylindrical tube face, and the overlap allowance falls right within the safe range of this rule; combined with M611, EOS2/3, MACH4S and other laboratory label printers and BRL-80-BK, BRL-110-BK cryogenic ribbons, a full roll of 500–1000 labels can print an entire batch of intake labels in one run.
Key Features
Film
PET polyester matte white face stock
T429 matte white PET polyester film; the smooth surface suits thermal-transfer small text and short barcodes, and die-cut edges are clean without fraying.
Temp
Passes all four temperature tiers
The T429 row of the official guide covers -196 °C LN₂, -80 °C freezer, 100 °C hot water, and 121 °C autoclaving.
Size
20 × 15 mm square format, full coverage
Approximately 4:3 ratio; one label fills the front-facing visible area of the cryovial body, and short IDs and short barcodes are clear in single-line layout.
Col
Two-column die-cut, continuous feed
The full roll is die-cut in two parallel columns; continuous feeding applies one label per tube, giving compact layout and high consumable utilization for batch intake.
Specifications
| Item No. | Lab168-429-3 |
| Nominal size | 20 × 15 mm (two-column die-cut) |
| Face stock | T429 matte white PET polyester |
| Temperature resistance | -196 °C LN₂ / -80 °C freezer / 100 °C hot water / 121 °C autoclaving |
| Official application | Cryovials / test tubes · packaging labeling |
| Corners | Rounded / square corners available |
| Packaging | 500–1000 labels/roll |
| Matching ribbon | BRL-80-BK / BRL-110-BK laboratory cryogenic ribbons |
| Compatible printers | M611 / EOS2/3 / MACH4S laboratory label printers |
Two-column die-cut roll format
Typical Applications
2 mL cryovial tube-face labeling
A single 20 × 15 mm label covers the mid-section of the tube body in full, carrying an 8–10 digit sample ID or a short barcode for both visual reading and scanning when handling racks.
Batch tube labeling for small diameters
Continuous feeding during biobank intake season; two-column die-cut applies one label per tube, and a full roll of 500–1000 labels covers one batch's labeling volume.
Freezer flat surfaces and cryogenic packaging
The official application scope includes packaging labeling; cryogenic shipping outer boxes, freezer bags and other flat surfaces can be labeled from the same roll, keeping the numbering system consistent with the tubes.
LN₂ tank handling and rewarming
After -196 °C LN₂ immersion, 37 °C water bath rewarming, and 121 °C autoclaving, the film-face labeling remains attached and legible throughout.
Application & Overlap Notes
1
Frost-free, dry tube face
After removing a frozen tube, defrost and wipe the labeling surface dry first; residual water film affects the initial adhesion of the cryogenic adhesive, and pressing after drying is more stable.
2
3 mm overlap at both ends
Official rules require at least 3 mm overlap at both ends when applied to a frozen tube face; after wrapping the square label, press the seam firmly to prevent edge lifting at low temperatures.
3
Center flat, then press
First apply the 20 × 15 mm format flat and centered on the tube body, then press outward from the seam to both sides to expel air bubbles, and finally press once over the overlap area at both ends.
4
Rest before low-temperature storage
After printing and labeling, let rest per laboratory procedures until the ribbon transfer layer and adhesive layer stabilize before placing into LN₂ or a -80 °C freezer.
FAQ
Q: How do I choose between 20 × 15 mm two-column die-cut and 25 × 17 mm three-column die-cut?
A: Both are made from T429 polyester face stock with the same temperature tiers. The 20 × 15 mm format is narrower and runs two columns, suitable for full coverage of 2 mL and smaller cryovial tube faces with shorter per-label information; the 25 × 17 mm format is wider and runs three columns, offering more room when a single label must hold both an ID and a barcode, with faster batch feed. Choose by tube diameter and per-label information volume.
Q: Can the labels be applied to microscope slides?
A: The application checkboxes in the T429 row of the official material guide are cryovials/test tubes and packaging labeling; microscope slides are not listed. For slide archiving, we recommend T629 nylon cloth all-scenario version, or for pathology staining requiring xylene resistance and H&E processes, use T424 with BRS series ribbons. The microscope slide wording in this page's product name is inconsistent with the official table; we have recorded it and fed it back for verification.
Q: Why is an overlap allowance needed when labeling frozen tubes?
A: In ultra-low temperature environments, tube diameter contracts slightly with temperature; if the label ends merely butt together without overlap, the seam tends to open after freeze–thaw cycles. Official rules require at least 3 mm overlap at both ends when T429 is applied to a frozen tube face; the overlap allowance keeps the seam pressed together.
Q: Can I print with a standard ribbon?
A: Not recommended. For low-temperature and LN₂ applications, use BRL-80-BK or BRL-110-BK laboratory cryogenic ribbons to ensure the transfer layer's adhesion and legibility through -196 °C to 121 °C temperature cycles.
Selection & Usage Guide
Same-family selection reference: for a wider information area per label, switch to the 25 × 17 mm three-column die-cut version; for thin-tube wrap-around overlap, switch to the 25.4 × 9.53 mm narrow strip version; when covering ambient freezer conditions above -40 °C with cost priority, switch to T419 gloss white PET or T329 matte white PP; for slide archiving or all-scenario general use, switch to T629 nylon cloth; for pathology solvent-resistant processes, switch to T424 with BRS ribbon. For more materials and specific applications, please contact the product manager for selection.
- Two-column die-cut per roll; before printing, test-apply one label to the target tube diameter to confirm the format and overlap allowance against the tube circumference meet the official 3 mm requirement.
- Keep printed content to a single-line short ID or short barcode; at 20 mm web width, small text and barcodes need sufficient quiet zones to avoid reduced scan recognition rates.
- For the same batch of samples, use the same ID digit count and layout template to facilitate cross-batch visual verification and subsequent scan retrieval.
Note: The temperature tiers, face stock and official application scope on this page are subject to the T429 row of the official material guide and the product specifications section; page images contain promotional banners and site-name watermark elements, and actual delivered specifications are subject to order confirmation. For ultra-low temperature operations, follow laboratory biosafety procedures and wear cryogenic gloves when handling materials in LN₂.
Need a bulk quotation for Lab168-429-3 or a custom size other than 20 × 15 mm?
Custom specifications and die-cut formats supported; free samples and selection advice available.
Sales Hotline 18015583218
