
( Brand: Nasco ), ( Manufacturer Part Number: B01062WA ), ( Part Type: Bag ), ( Size: One Size ), ( Capacity: 118.0 ), ( Is Microwaveable: Yes ), ( Included Components: . ), ( Closure Type: Pull On ), ( National Stock Number: 6530-01-478-9068 ), ( Color: Clear, Yellow ), ( Item Shape: Rectangular ), ( Unit Count: 500.0 ), ( UPC: 024141220172 ), ( Package Dimensions Lxwxh: 8.66x6.97x5.55 Inches ), ( Weight: 2.36 Pounds )
The **Nasco Whirl-Pak Write-On Bag** (product code B01062WA) is a versatile, high-quality laboratory and field sampling tool designed to provide a secure, leak-proof containment solution for liquids, powders, or small biological specimens. Engineered with precision, this compact yet durable bag features a **7.5 cm by 18.5 cm** footprint, offering ample space for a variety of applications while maintaining portability. Its **0.057 mm (57 microns) thick** polyethylene film ensures exceptional strength and puncture resistance, making it ideal for handling corrosive chemicals, biological samples, or environmental swabs without risk of contamination or leakage. The **118 ml capacity** strikes a practical balance, accommodating everything from small liquid aliquots to solid residues, while still allowing for easy sealing and storage.
One of the most distinctive features of this Whirl-Pak bag is its **write-on surface**, which eliminates the need for external labeling. The smooth, ink-friendly exterior allows for clear, permanent markings directly on the bag using standard markers, pens, or even permanent ink, ensuring sample identification remains legible even after prolonged use or exposure to environmental conditions. This feature is particularly advantageous in fieldwork, laboratory rotations, or quality control settings where quick, accurate labeling is critical. The bag s **heat-sealable design** guarantees a tight, airtight closure, preventing evaporation, spills, or microbial contamination, while its **whirl-packing technology** a proprietary method of sealing ensures a secure, tamper-evident closure that maintains sterility and integrity.
Beyond its functional benefits, the Whirl-Pak Write-On Bag is designed with practicality in mind. Its **rigid yet flexible structure** allows for easy filling, even with viscous or semi-solid samples, while its **flat, stackable profile** optimizes storage efficiency in lab drawers, field kits, or refrigerated environments. The material is also **chemically resistant**, making it compatible with a wide range of solvents, acids, and bases, and its **non-toxic, food-safe polyethylene** ensures compliance with regulatory standards for both laboratory and food-related applications. Whether used for **environmental testing, microbiological cultures, forensic analysis, or agricultural sampling**, this bag combines reliability, convenience, and durability into a single, indispensable tool. Its combination of **write-on functionality, leak-proof sealing, and robust construction** makes it an essential addition to any professional or educational setting where sample integrity and organization are paramount.
### **Pros and Cons of buying a NASCO B01062WA Whirl-Pak Write-On Bag (7.5 cm x 18.5 cm, 0.057 mm, 118 ml)**
#### **Pros:**1. **Versatility in Laboratory Use** The write-on feature allows for direct labeling of samples, reducing the need for external markers or labels, which can be especially useful in fast-paced lab environments.
2. **Durable and Leak-Proof Design** Whirl-Pak bags are known for their puncture-resistant and leak-proof construction, ensuring sample integrity during storage, transport, or processing.
3. **Compatibility with Common Lab Equipment** The size (7.5 cm x 18.5 cm) fits standard lab instruments, including centrifuges, homogenizers, and some incubators, making it practical for a variety of procedures.
4. **Sterile and Contaminant-Free** NASCO products are typically manufactured under sterile conditions, minimizing the risk of cross-contamination in sensitive experiments.
5. **Cost-Effective for Bulk Use** While individual bags may seem expensive, they are often used in bulk for large-scale experiments, reducing per-sample costs over time.
6. **Chemical Resistance** The thin gauge (0.057 mm) is suitable for many solvents and reagents, though specific compatibility should be verified for aggressive chemicals.
7. **Easy to Seal and Open** The heat-sealable design ensures a secure closure, and the write-on surface allows for quick identification without additional labeling steps.
#### **Cons:**1. **Limited Write-On Surface Durability** While the bag can be written on, repeated marking may cause wear or smudging, potentially obscuring labels over time.
2. **Not Reusable** Once opened or contaminated, the bag should be disposed of, which can contribute to waste if overused.
3. **Size Constraints** At 118 ml, the bag may be too small for certain high-volume samples or procedures requiring larger volumes.
4. **Potential for Puncture Risk** Though designed to be puncture-resistant, sharp instruments or improper handling could still compromise the seal.
5. **Cost per Unit** Individual bags can be relatively expensive compared to alternatives like test tubes or microcentrifuge tubes, though bulk purchases mitigate this.
6. **Limited Transparency** Unlike some plastic tubes, the bag does not allow visual inspection of contents without opening, which may be inconvenient for certain applications.
7. **Environmental Impact** Single-use plastic bags contribute to waste, though recycling programs may be available depending on the lab s policies.
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### **Conclusion**
The NASCO Whirl-Pak Write-On Bag is a practical choice for laboratories requiring a reliable, leak-proof, and easy-to-label sample container. Its durability, chemical resistance, and compatibility with standard lab equipment make it suitable for a wide range of applications, particularly in microbiology, molecular biology, and general sample storage. However, its single-use nature, limited write-on durability, and cost per unit may pose challenges depending on the scale and specific needs of the lab.
### **Recommendation**
**Buy this product if:**- You need a durable, leak-proof bag for sample storage or transport in a lab setting.
- Direct labeling is a priority to streamline workflow and reduce labeling errors.
- You work with moderate sample volumes (up to 118 ml) and require compatibility with common lab equipment.
- Bulk purchasing is feasible to offset per-unit costs.
**Consider alternatives if:**- You frequently handle very large volumes or require reusable containers.
- You need frequent visual inspection of contents without opening the bag.
- Cost is a major concern, and alternatives like microcentrifuge tubes or reusable plastic containers may be more economical.
- Your workflow involves highly aggressive chemicals that may degrade the bag material.
For most standard laboratory applications, the NASCO Whirl-Pak Write-On Bag is a worthwhile investment due to its convenience and reliability. However, always verify compatibility with specific reagents and procedures before use.
Capacity is measured in fluid ounces, Bags should not be used at temperatures above 180 F 82 C, can frozen to any temperature, Item Package Dimension: 16.0 L x 12.0 W 8.0.