Fulfillment centers and third-party logistics providers (3PLs) handle products from dozens of different customers, each with their own packaging requirements. When those products are vitamins, nutritional supplements, or health-related items heading into retail, the marking requirements get serious fast. Retailers expect clear, permanent lot codes and date codes on every package. If those codes are missing, illegible, or inconsistent, the product does not make the shelf.
What Marking Challenges Do Fulfillment Centers Face with Vitamins and Supplements?
The challenge for most fulfillment operations is finding a marking solution that can keep up with varying package sizes, frequent changeovers between product runs, and the need for portability on the warehouse floor. Traditional marking methods like pre-printed labels or manual stamping systems often fall short because they're either too slow to change over, too expensive for short runs, or not permanent enough to satisfy retail compliance standards.
How Did PTS Fulfillment Solve Their Date Coding Problem?
PTS Fulfillment, a fulfillment center and warehouse located in Aurora, IL, needed an easy-to-set-up solution for adding lot codes and date codes to packages of vitamins and nutritional supplements. Arthur Prokrop says that "our customers are moving into retail displays of our products and need to be able to track date and lot codes. We needed a permanent marking solution that was easy to set up and program, as well as being portable, so we reached out to the experts at Durable Technologies, and they recommended the JetStamp EM792MP and EM790BKQD ink cartridge, and they have worked perfectly for our application."
PTS Fulfillment's situation is common among growing fulfillment operations. Their customers were transitioning from online-only or direct-to-consumer shipping to retail distribution, where traceability standards are far more demanding. The JetStamp gave them the ability to quickly program lot codes and expiration dates, mark each package in under a second, and move the printer between workstations as needed throughout the day.
See the JetStamp in Action
Why Choose a Portable Inkjet Printer for Package Date Coding?
For 
operations like PTS Fulfillment, the biggest advantage of a portable inkjet printer over inline systems or label applicators is flexibility. The JetStamp weighs about one pound, runs on battery or plug-in power, and can be programmed directly or through a PC. That means a warehouse worker can grab it off a charging dock, key in the current lot code, and start marking packages within minutes.
Compare that to inline inkjet systems, which are designed for high-volume continuous production lines and require fixed mounting, conveyor integration, and more involved setup. Those systems make sense for a large food manufacturer running thousands of units per hour on a single line. But in a fulfillment environment where the product mix changes throughout the day and production runs can be relatively short, a portable printer eliminates the overhead of setting up and tearing down inline equipment.
Cost matters, too. The JetStamp's ink cartridges deliver up to 5,000 impressions per 3mL cartridge. For a fulfillment center processing multiple short-to-medium runs daily, that kind of yield keeps per-unit marking costs low without the maintenance burden that comes with larger inkjet systems.
What Is the Difference Between Porous and Non-Porous Ink for Package Marking?
One of the most common questions we hear from fulfillment centers and contract packagers is which ink they need. The answer depends entirely on the packaging material being marked.
The JetStamp line uses two distinct ink series. The EM series inks are water-based and designed for porous (absorbent) substrates like cardboard, uncoated paper, and kraft packaging. These inks soak into the material and dry naturally, producing a clean, permanent mark without smearing. The MP series inks are quick-dry, solvent-based formulations built for non-porous (non-absorbent) substrates such as plastic bottles, coated cartons, glass, and metal surfaces. The solvent-based formula adheres to slick surfaces where water-based inks would bead up or wipe off.
PTS Fulfillment's vitamin and supplement packaging involved a mix of both porous and non-porous materials, which is why Durable Technologies recommended the EM792MP configuration. That model designation indicated compatibility with both substrate types, giving the fulfillment team the flexibility to mark cardboard boxes, paper labels, and coated packaging without switching printers. Available ink colors include black, red, and blue, with blue limited to the EM series for porous substrates only.
What Industries Use the JetStamp for Lot Codes and Date Codes?
The PTS Fulfillment application is a textbook example, but the JetStamp sees use across a wide range of industries where portable, programmable date coding is needed.
In the cosmetics and personal care industry, a skin care company on the East Coast switched from handheld label applicators to the JetStamp after regulatory authorities in the Middle East rejected their labels as non-permanent. The JetStamp allowed them to print tamperproof batch codes and expiration dates directly onto plastic and glass bottles in under one second per unit. Their cost per code dropped below what they had been paying for hand-applied paper labels.
Contract packagers frequently choose the JetStamp because they handle products for multiple clients, each with different coding requirements. The ability to reprogram the printer quickly between runs reduces changeover time and keeps throughput high. Cannabis companies facing strict state-by-state traceability regulations rely on the JetStamp for compliant batch and lot coding on a range of packaging formats. Food and beverage operations, lumber yards, metal fabricators, and supply chain and logistics providers round out the list of industries where the JetStamp delivers value.
JetStamp Technical Specifications
The JetStamp family of printers is designed to be picked up and used with minimal training. Here are the key specs that matter for fulfillment, packaging, and warehouse applications:
- Prints 1 or 2 lines of alpha-numeric text, sequential numbering, and automatic date and time
- Maximum of 20 characters per line with a maximum print width of 1.65"
- Character height of 1/8" with adjustable widths
- Up to 5,000 impressions per 3mL ink cartridge
- Black, red, and blue ink cartridges available (blue only available with EM series for porous substrates)
- Weight: approximately 1 pound
- Dimensions: 6.6" H x 3.7" W x 3" D
- Available in three configurations: battery-operated, plug-in with power supply, and direct online printing via PC interface
Programming is straightforward. Messages can be created and loaded through the printer's own interface or through a connected PC, depending on the model. For operations that need to mark the same code across a full production run, the set-it-and-go simplicity keeps operators focused on throughput rather than fiddling with equipment.
Has the JetStamp Been Updated Since This Case Study?
Yes. The JetStamp model referenced in the PTS Fulfillment case study (EM792MP) was part of Reiner's earlier generation of JetStamp printers. That line, which included the 790, 792, 790MP, and 792MP models, has since been replaced by the JetStamp 990.
The 990 consolidates the previous EM and MP model variants into a single unit that handles both quick-dry solvent-based and water-based ink cartridges. It also offers rechargeable battery and plug-in power supply options within the same unit, along with USB and Bluetooth programming (PC only, not MAC compatible). For fulfillment centers and contract packagers, the 990 simplifies inventory because one printer covers both porous and non-porous substrates.
For applications that require barcodes, graphics, or larger print areas, Durable Technologies also offers the JetStamp Graphic 970 (1/2" x 2-1/2" print area) and the JetStamp Graphic 1025 (up to 1" x 3-1/2" print area at 300 DPI). The 1025 includes a self-traversing printhead, USB/Bluetooth/Micro SD programming, and the ability to print 1D and 2D barcodes, making it well-suited for operations that need to encode more complex data on packaging.
How to Get Started with a Portable Inkjet Printer
Whether you are a fulfillment center moving into retail distribution, a contract packager handling multiple product lines, or a manufacturer that needs to add lot code and date code capabilities to your packaging process, Durable Technologies can recommend the right JetStamp configuration for your specific materials and production requirements.
We routinely provide print samples on customer-supplied materials before purchase, so you can verify mark quality and adhesion on your actual packaging before committing.
Contact us for all of your package date coding needs.
