Drick DRK155 Corona Test Pen (Dyne Pen) – Disposable & Refillable Fast-Drying Surface Tension Tester

Overview

The Drick DRK155 Corona Test Pen is a precision-engineered surface energy verification tool designed for rapid, on-site assessment of polymer film wettability prior to printing, adhesive lamination, or vacuum metallization. Based on the standardized dyne solution test method—governed by ASTM D2578 (Standard Test Method for Surface Wettability of Polyethylene and Polypropylene Films by Dyne Solutions) and ISO 8296 (Plastics — Polyolefin films — Determination of surface tension by the dyne solution method)—the DRK155 employs calibrated surfactant-based test inks with defined surface tensions ranging from 38 to 50 mN/m in 2-unit increments. When applied under controlled pressure and orientation, the ink’s wetting behavior (continuous bead vs. contraction/reticulation within 2 seconds) provides immediate qualitative confirmation of whether the substrate’s surface energy meets the minimum threshold required for stable ink adhesion or adhesive bonding. This principle relies on the thermodynamic equilibrium between liquid surface tension and solid surface free energy, enabling process engineers and QC technicians to make real-time decisions without laboratory instrumentation.

Key Features

• Two operational configurations: DRK155A (disposable single-use pen) and DRK155B (refillable pen with spring-actuated piston feed system for consistent ink delivery)
• Fast-drying formulation (<3 seconds evaporation time), minimizing operator waiting time and enabling high-throughput line checks
• Hermetically sealed pen cap design prevents solvent evaporation and contamination—extending shelf life up to 12 months when stored at 15–25°C
• Non-toxic, low-VOC ethanol/isopropanol-based ink formulations compliant with OSHA and REACH requirements for industrial handling
• Optimized tip geometry ensures uniform line width (0.8–1.2 mm) and reproducible application force across operators
• Supplied as a complete kit: one pen + one 100 mL bottle of certified dyne solution (traceable to NIST-traceable calibration standards)

Sample Compatibility & Compliance

The DRK155 is validated for use on common flexible packaging substrates including polyethylene (PE), polypropylene (PP), polyester (PET), polyvinyl chloride (PVC), and polyamide (PA) films. Testing is performed at ambient temperature (20 ± 2°C), per ASTM D2578 and ISO 8296 protocols. Each dyne level (38, 40, 42, 44, 46, 48, 50 mN/m) is independently verified using gravimetric dilution and pendant drop tensiometry against reference standards. The instrument complies with GLP-aligned documentation requirements: batch-specific Certificate of Conformance (CoC) includes lot number, expiration date, certified surface tension value (±0.3 mN/m accuracy), and storage instructions. Not intended for conductive or heavily corona-treated surfaces exceeding 52 mN/m, nor for UV-cured coatings or silicone release liners.

Software & Data Management

As a manual field-testing device, the DRK155 does not incorporate embedded electronics or software. However, its use is fully compatible with digital quality management systems (QMS) such as TrackWise, MasterControl, or Qualio. Operators record results manually in paper-based checklists or via mobile QMS apps using standardized templates aligned with ISO 9001:2015 clause 8.2.4 (Monitoring and measurement of processes). For audit readiness, all test logs must include: date/time, operator ID, film lot number, tested dyne levels, observed wetting behavior (pass/fail), and corrective actions taken. Traceability is enhanced through serialized pen and ink bottle lot tracking—supporting FDA 21 CFR Part 11-compliant electronic records when integrated with validated e-signature workflows.

Applications

• Pre-print inspection of PE/PP shrink films to verify corona treatment efficacy before flexographic or gravure press entry
• Post-lamination QA for PET/AL/PE laminates—ensuring sufficient surface energy for polyurethane adhesive anchorage
• In-process verification during vacuum metallization of BOPP films to prevent delamination in high-barrier packaging
• Root cause analysis of ink rub-off or poor hot-melt adhesion in pouch manufacturing lines
• Supplier qualification audits where surface energy specification compliance (e.g., ≥42 mN/m for water-based inks) is contractually mandated

FAQ

How many dyne pens are required for accurate surface energy determination?
At minimum, three pens spanning a 4 mN/m range (e.g., 40, 42, 44) are recommended for bracketing; six pens (38–48) are advised for initial baseline characterization or when treatment consistency is unknown.
Why does ink retract on the film surface?
Retraction indicates the film’s surface energy is lower than the ink’s surface tension—resulting in insufficient wetting and high contact angle (>10°), which correlates to poor adhesion potential.
Can DRK155 be used on metallized or coated films?
Yes, provided the coating is non-polar and non-reactive with ethanol/IPA solvents; avoid use on SiOx or AlOx barrier coatings unless validated per ASTM F1921 Annex A3.
What is the shelf life of unopened dyne solution?
12 months from manufacture date when stored upright at 15–25°C in original amber bottle; discard if discoloration or phase separation occurs.
Is calibration required before use?
No periodic calibration is needed—the ink’s surface tension is chemically fixed and certified per batch; however, daily verification using a control film of known surface energy (e.g., untreated PP = 31 mN/m) is strongly recommended.