Many sourcing problems begin with an incomplete description such as “strong tape” or “same as the sample.” A repeatable order needs a specification that both buyer and supplier can measure.
1. Define the Application
Record the surface, application method, temperature, humidity, load, exposure time, indoor or outdoor use and the consequence of failure. Photographs and physical samples can reveal texture and geometry that a product name cannot.
2. Define the Construction
- Backing or facestock material and thickness
- Adhesive family and expected behavior
- Release liner material and release direction
- Total thickness and color
3. Define Performance With a Method
Peel, tack and shear values are meaningful only when the method, test surface, dwell time, conditioning, angle, speed, load and units are stated. ASTM and PSTC publish methods used to compare pressure-sensitive tape properties. A test result is not a universal prediction for every real surface.
4. Define Conversion
Specify width, length, core, winding direction, splices, edge quality, printing, die-cut tolerance and roll quantity. For machine application, include maximum roll diameter and unwind requirements.
5. Define Packing and Acceptance
Document inner packs, cartons, labels, pallets, sampling plan and the records required with each lot. Keep the approved sample and specification revision connected to the purchase order.
Buyer Checklist
- Application and substrate
- Construction and dimensions
- Performance method and conditions
- Converted format and tolerance
- Packing, traceability and required documents