Lab112-429-3 roll photo (page image, visually verified 2026-09-21)
T429 matte white PET polyester · LN₂ cryopreservation and biobank identification
Lab112-429-3 · 35 × 25 mm freezer label
A near-square large format, 35 mm wide × 25 mm high: a single label fits a long ID number, barcode and QR code; leaves overlap allowance on cryovial surfaces and holds through all four temperature tiers.
T429 PET polyester35 × 25 mm-196 °C LN₂Cryovials/test tubes + packaging labeling500–1000 labels/roll
Product Overview
Lab112-429-3 cryogenic freezer labels use T429 matte white PET polyester face stock and are laboratory labels for -196 °C LN₂ to 121 °C autoclaving environments, for labeling cryovial and test tube surfaces and low-temperature packaging.Nominal size 35 × 25 mm, aspect ratio 7:5 — one of the larger near-square formats in this series: the 25 mm height fits two to three lines of text, and the 35 mm width accommodates a QR code or a long barcode alongside the text, so a single label carries the complete identification.
The application scope stated on this page is LN₂ cryopreservation, biobanking and ultra-low temperature environments (-196 °C). Beyond single-vial numbering, biobank workflows also require a numbering system on cryoboxes, cryobags and transport outer cartons that matches the in-vial system. The larger the single label area, the more fields it can hold — code digits, collection date and box position can all be laid out at once without splitting across two labels.
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 frozen surfaces," passing all four tiers — LN₂ -196 °C, freezer -80 °C, hot water 100 °C and autoclaving 121 °C — with official applications checked as cryovials/test tubes and packaging labeling. Four-tier coverage means a single label can follow a specimen through the entire pre-processing chain of cryopreservation, rewarming and sterilization/inactivation without relabeling in between.
Key Features
面
35 × 25 mm near-square large format
7:5 near-square layout; a single label fits text fields such as ID number, date and box position plus a QR code or barcode.
温
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.
材
Matte white PET polyester film
The matte white surface is flat and non-reflective, making thermal-transfer QR codes easier for scanners to read in low-light cryogenic rooms.
界
One system for tubes and packaging
Official applications include packaging labeling: tube labels and the outer layers of cryobags, cryoboxes and transport cartons can be printed with the same numbering system.
Specifications
| Item No. | Lab112-429-3 |
| Nominal size | 35 × 25 mm |
| Face stock | T429 matte white PET polyester |
| Temperature resistance | -196 °C LN₂ / -80 °C freezer / 100 °C hot water / 121 °C autoclaving |
| Official applications | 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 ribbon |
| Compatible printers | M611 / EOS2/3 / MACH4S laboratory label printers |
Roll format
Typical Applications
Full-format labeling at biobank intake
One label holds the specimen ID, collection date and box position, with a QR code in the remaining space; continuous roll feed lets the whole intake batch be labeled in one pass.
Long-term storage in LN₂ tanks
Specimens go directly into LN₂ vapor or liquid phase; print and adhesive remain stable at -196 °C, and IDs stay readable and scannable after repeated retrieval.
Cryobox and rack zoning
Label cryobox sides, drawer dividers and racks with the same numbering system — IDs on the rack, specimens in the box — for a continuous location path.
Low-temperature transport outer labeling
Label cryobags and transport carton exteriors with the same material to mark batch and destination, matching in-vial IDs one-to-one so handover checks need no vial-by-vial retrieval.
Labeling & Printing Notes
1
Defrost and dry the tube surface
After removing specimens from low temperature, defrost and dry the tube surface so the cryogenic adhesive bonds initially to a dry, clean surface, avoiding a trapped condensation film.
2
3 mm end overlap
Official rules require at least 3 mm overlap between the ends when T429 is applied to cryovial surfaces. The 35 mm width leaves ample overlap when wrapped around small diameters; confirm seam position before wrapping.
3
Leave a quiet zone around QR codes
Keep a quiet zone around QR codes in the layout; shrinking code size to gain more text fields reduces reading tolerance in low-temperature environments — set code size based on test scans.
4
Finalize the numbering template once
Lock the number of digits and field order before bulk printing; use the same template across batches of a project to support retrieval years later.
FAQ
Q: How do I choose between 35 × 25 mm and the 25 × 17 mm square format?
A: Both are square-oriented; the difference is information capacity per label. 35 × 25 mm has about twice the area of the base format, suitable for a QR code, long ID number and multiple text fields at once; 25 × 17 mm follows a three-column die-cut bulk-printing route, suitable when fields are minimal and labeling throughput comes first. Both use T429 face stock with the same temperature tiers.
Q: Can this be applied to microscope slides?
A: The official material guide's T429 row checks applications as cryovials/test tubes and packaging labeling, with no microscope slides listed; for slide archiving, use the T629 nylon cloth all-scenario version instead. The word "microscope slide" in this page's name is inconsistent with the official application scope; please refer to the official application scope when selecting.
Q: Is any extra treatment needed in LN₂ environments?
A: Official rules require at least 3 mm end overlap when T429 is applied to cryovial surfaces; in LN₂ scenarios also leave sufficient overlap and press the seam firmly. Follow laboratory biosafety regulations and wear appropriate protective equipment when handling LN₂.
Q: How does packaging labeling differ?
A: In-vial labels go on the tube body, with area limited by tube diameter; packaging labels go on the outer layers of cryobags, cryoboxes or transport cartons, and the same 35 × 25 mm format can be printed with the same numbering system so outer and in-vial IDs correspond.
Selection & Usage Guide
Selection within the family: for minimal fields and labeling throughput first, switch to the 25 × 17 mm three-column die-cut version; for full-format single-vial coverage on smaller diameters, switch to the 20 × 15 mm square format; for narrow formats needing only an ID number or short barcode, switch to the 25 × 10 mm or 25.4 × 9.53 mm strip format; if specimens undergo 100 °C water bath and 121 °C autoclaving with readability during rewarming as the priority, also choose T429 with BRL series cryogenic ribbon; for routine freezing above -40 °C only with cost as the priority, switch to T419 gloss white PET or T329 matte white PP; for all-scenario general use and slide archiving, switch to T629 nylon cloth; for pathology xylene resistance and H&E staining processes, switch to T424 with BRS series ribbon. For more materials and specific applications, contact the product manager for selection.
- Measure the target tube diameter and labelable curved surface height once before layout, and confirm that the 35 mm width leaves overlap meeting the official 3 mm requirement after wrapping.
- Test-scan QR codes and barcodes once in the frozen state; set code size and print darkness based on actual scan results before bulk printing.
- Use the same numbering template and ribbon model across batches of a project to reduce print darkness variation in long-term archiving.
Note: 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 watermarks, and actual delivered specifications are subject to order confirmation. Follow laboratory biosafety regulations and wear appropriate protective equipment for operations involving LN₂ and autoclaving.
Need a bulk quotation for Lab112-429-3 or a custom size other than 35 × 25 mm?
Custom specifications and die-cutting available; samples and selection advice provided.
Sales Hotline 18015583218
