Heavy-duty reclosable bags with integrated white write-on blocks for clear labeling and chain-of-custody tracking. These 12" x 12" reclosable bags feature a large white write-on area that accepts both pen and permanent marker, making them ideal for law enforcement evidence collection, laboratory sample identification, medical specimen handling, and industrial parts organization. The 4 mil thickness provides puncture-resistant protection while the side-welded reclosable zipper locks securely in a single smooth motion. Made from 100% virgin Low Density Polyethylene (LDPE), these bags meet FDA and USDA specifications for food-contact compliance, allowing versatile use across healthcare, food service, and commercial applications. The white block provides high contrast for clear, legible labeling even in time-sensitive situations. Key Benefits: Large white write-on block accepts pen, marker, or label for permanent identification 4 mil heavy-duty construction resists punctures and tears from sharp contents Reinforced side-welded reclosable zipper provides secure, tamper-evident closure FDA and USDA food-contact compliant for versatile applications 12x12 gallon-equivalent size accommodates bulky items and large samples Superior clarity allows visual inspection without opening Specifications: 12" x 12" | 4 mil | LDPE (Low Density Polyethylene) | 1000/case | Reclosable zipper | White write-on block | FDA-compliant Common Applications: Law enforcement evidence collection and chain-of-custody tracking, laboratory sample storage and identification, medical specimen transport and documentation, pharmaceutical dispensing and patient labeling, industrial parts organization and inventory control, food portioning and freezer storage with date labels, document archival and secure storage. What are white block reclosable bags? White block reclosable bags feature an opaque white panel printed directly on the bag surface that accepts pen, marker, or adhesive labels for permanent identification and tracking. This write-on area provides high contrast for legible labeling without requiring separate tags or labels. Why use 4 mil thickness for evidence and sample bags? 4 mil thickness provides heavy-duty puncture resistance for contents with sharp edges or irregular shapes while maintaining enough flexibility for easy handling and storage. This makes 4 mil ideal for evidence collection, laboratory samples, and medical specimens where bag integrity is critical. Can you write on white block bags with regular pen? Yes, white block bags accept both ballpoint pen and permanent marker. For best results, use firm pressure with ballpoint pens or allow permanent marker ink to dry for 10-15 seconds before handling to prevent smudging.

Brand: NFC Bags
SKU: 4024A
Price: 160.94 USD
Availability: InStock

White Block 4 mil 12" x 12" x 4 mil WWO 1000/CT

Product Details

Brand: NFC Bags

Gauge: 4

Width: 12

Film Type: Recyclable LDPE

White Block 4 mil 12" x 12" x 4 mil WWO 1000/CT

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