Heavy-duty reclosable bags with built-in white write-on blocks for clear sample identification and tracking. These 4 mil reclosable bags feature a large white block area that accepts pen or marker for easy labeling directly on the bag—eliminating the need for separate labels or tags. The reinforced side-welded zipper closure locks securely in one smooth motion, protecting contents while allowing quick access when needed. Made from 100% virgin Low Density Polyethylene (LDPE), these bags offer excellent puncture resistance and durability for laboratory samples, medical specimens, pharmacy dispensing, and parts tracking applications. The white write-on block provides a permanent writing surface that won't smudge or rub off, making these bags ideal for applications requiring sample identification, date tracking, or chain-of-custody documentation. The 4 mil thickness provides superior strength compared to standard 2 mil bags, protecting contents from punctures and tears during handling and storage. Key Benefits: Built-in white block eliminates need for separate labels—write directly on bag with pen or marker 4 mil heavy-duty construction resists punctures and tears Reinforced side-welded zipper provides secure, reliable closure FDA-compliant food-contact safe LDPE material Clear body allows visual inspection of contents while maintaining write-on area Economical alternative to pre-printed or custom labeled bags Specifications: 6" x 8" | 4 mil | LDPE (Low Density Polyethylene) | 1000/box | White write-on block | Reclosable zipper Common Applications: Laboratory specimen collection and storage, pharmacy prescription dispensing, medical sample tracking, evidence collection and chain-of-custody, electronic component storage with part numbers, hardware and fastener sorting with size/type identification, quality control sample tracking in manufacturing. What are white block reclosable bags? White block reclosable bags feature a white opaque area printed directly on the bag that accepts pen or marker for labeling and identification. This eliminates the need for separate adhesive labels while providing a permanent writing surface that won't smudge or peel off. What mil thickness is best for laboratory sample bags? 4 mil thickness provides excellent puncture resistance and durability for laboratory samples, medical specimens, and applications requiring secure containment. This is approximately twice as thick as standard 2 mil bags, offering superior protection during handling and storage. Can you write on these bags with any pen or marker? Yes, the white block area accepts both ballpoint pen and permanent marker. For best results, use a permanent marker (such as Sharpie) for labels that need to withstand moisture or handling. Ballpoint pen works well for temporary labeling or when a finer writing line is needed.

Brand: NFC Bags
SKU: 3999A
Price: 54.44 USD
Availability: InStock

White Block 4 mil 6" x 8" x 4 mil WWO 1000/Box

Product Details

Brand: NFC Bags

Gauge: 4

Film Type: Recyclable LDPE

White Block 4 mil 6" x 8" x 4 mil WWO 1000/Box

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