| 1 | Crystal Material | Confirm the material specification and applicable safety requirements before comparing appearance. | Request the stated glass composition, intended use, food-contact suitability where relevant, and test documentation for the destination market. | Marketing terms may be used without a clear technical definition. | Require a written material specification with every quotation. |
| 2 | Clarity and Optical Quality | The surface should appear clear and consistent under bright, diffuse light. | Inspect samples for visible bubbles, stones, cord lines, devitrification, haze, and uneven transparency. Define acceptable limits in advance. | Small production defects can be difficult to identify from edited photos. | Approve a physical or high-resolution reference sample. |
| 3 | Cutting and Craftsmanship | Patterns, edges, and decorative details should be symmetrical and consistently aligned. | Compare facet alignment, engraving depth, edge sharpness, joins, base stability, and consistency across several pieces from the same batch. | Hand finishing can create natural variation if tolerances are not agreed. | Set measurable tolerances for dimensions, alignment, and acceptable variation. |
| 4 | Surface Finish | Polished areas should be smooth, even, and free from visible scratches or cloudy patches. | Check polishing uniformity, rim smoothness, base contact, coating adhesion if used, and resistance to ordinary handling marks. | A glossy sample may conceal inconsistent finishing on production pieces. | Inspect multiple samples from different cartons, not only one display sample. |
| 5 | Dimensions and Weight | Dimensions and weight should remain within the agreed production tolerance. | Measure height, width, wall thickness where relevant, base diameter, net weight, and packed weight. Confirm measurement tools and methods. | Dimensional variation may affect retail packaging, shelving, and freight calculations. | Include a dimensional tolerance sheet in the purchase order. |
| 6 | Color and Decorative Consistency | Color should be evaluated under a consistent lighting condition and against an approved reference. | Compare hue, saturation, transparency, printed or plated details, and decoration placement across samples and production lots. | Lighting, photography, and screen settings can change perceived color. | Use a physical color standard or agreed lighting procedure for approval. |
| 7 | Packaging Design | Each item should be immobilized and separated from neighboring items inside a rigid outer carton. | Check cushioning thickness, corner protection, dividers, inner-box fit, carton strength, moisture protection, and drop-test evidence where available. | Decorative packaging alone does not guarantee impact protection. | Approve a packed sample before mass production and shipment. |
| 8 | Shipping Safety | The shipping plan should account for vibration, stacking, shock, and temperature changes during multimodal transport. | Confirm carton markings, pallet stability, maximum stacking guidance, insurance coverage, inspection photos, and handling requirements. | Glass damage may occur after factory inspection during transshipment or last-mile delivery. | Define damage-reporting deadlines and retain loading photos and carton records. |
| 9 | Compliance and Documentation | Documents should match the actual product, destination requirements, and declared packaging details. | Verify commercial invoice, packing list, country-of-origin details, product codes, test reports, labeling, and any required food-contact or chemical declarations. | Incomplete or inaccurate paperwork can delay customs clearance. | Use a destination-specific document checklist before dispatch. |
| 10 | Inspection and Reorder Control | Quality should be checked at sample approval, pre-shipment, and after receipt of the first commercial order. | Record defect categories, sample size, acceptance criteria, carton numbers, batch information, and corrective-action requirements. | Without batch records, recurring defects are difficult to trace or correct. | Keep an approved master sample and use the same inspection checklist for every reorder. |