| Reinforcement and resin | Carbon-fiber reinforcement is combined with a resin matrix to form a composite laminate. The resin system and reinforcement format depend on the product design. | Review material specifications and incoming-material records; inspect for visible contamination, damage, or inconsistent material condition. | Ask for the material specification, applicable technical data sheets, and batch traceability. |
| Lay-up and laminate preparation | Composite layers are arranged to meet the required thickness, appearance, and structural design. Layer orientation and construction can vary by product. | Check the lay-up against the approved work instructions and inspect representative laminate samples for defects such as wrinkles or void indications. | Confirm the approved layer construction and how process changes are controlled. |
| Curing and consolidation | The laminate is consolidated and cured using a process appropriate to the selected resin and material supplier’s instructions. | Review recorded process parameters and inspect cured material for delamination, surface defects, or other specified nonconformities. | Request process records for the production lot. Cure conditions should follow the material specification rather than a universal time or temperature. |
| Cutting and card sizing | Panels or laminates are cut and machined to the dimensions defined in the product drawing. | Measure length, width, and thickness with suitable calibrated instruments; compare results with the approved drawing and tolerance limits. | Provide a controlled drawing that states dimensions, tolerances, and measurement locations. |
| Edge finishing and surface treatment | Edges are finished, and any specified coating, printing, or surface treatment is applied after machining or at the designated process stage. | Conduct visual inspection for burrs, chips, scratches, uneven finish, and defects in printing or coating. Adhesion testing may be used when specified. | Define acceptable appearance, edge condition, coating requirements, and inspection lighting or viewing conditions. |
| Flatness and visual appearance | Finished cards are checked for shape and visible manufacturing defects. | Assess flatness using the method and limits stated in the product specification; inspect both faces and all edges. | Agree on flatness limits and visual acceptance criteria before production approval. |
| Mechanical performance | Mechanical requirements depend on the card’s intended use, construction, and expected handling conditions. | Bend, flex, or other mechanical tests can be performed using an agreed test method and sample plan. | Specify the test method, conditioning, sample quantity, and pass criteria; avoid relying on unspecified “strength” claims. |
| Environmental durability | Resistance to heat, humidity, chemicals, or other environments is evaluated when relevant to the application. | Use agreed environmental exposure tests, followed by inspection or functional checks for damage, dimensional change, or surface deterioration. | Identify the actual service environment and define exposure conditions and acceptance limits in the purchase specification. |
| Embedded electronics, if applicable | Some card designs include an embedded contactless inlay or other electronic component; this is not present in every carbon-fiber card. | Check the electronic component’s function and communication performance using equipment appropriate to the design. | Confirm whether the card includes electronics and specify the required functionality and test procedure. |
| Final inspection and lot traceability | Finished cards are checked, identified, packed, and linked to their production and material records. | Review inspection results, nonconformance records, sample identification, and final release documentation. | Request a lot-specific inspection report and confirm how rejected products and corrective actions are handled. |