| Product Design | Rack length | Approximately 430–470 mm for a standard four-player rack format. | Confirm compatibility with the tile size, table width, and the intended regional mahjong format. | Request a dimensioned drawing or pre-production sample. |
| Product Design | Rack height and depth | Commonly about 25–45 mm high and 20–35 mm deep, depending on the profile. | A taller profile can improve tile support; a deeper profile may increase packed volume. | Check stability with the actual tile set rather than with empty racks. |
| Material | Plastic type | PP and ABS are frequently used for plastic game accessories. PP is generally lighter and more flexible; ABS is generally more rigid. | Select the resin according to rigidity, appearance, impact resistance, and target price. | Request the material declaration and confirm whether recycled content is included. |
| Material | Surface finish | Gloss, matte, textured, or color-matched finishes are commonly available. | Matte or lightly textured surfaces can help reduce visible scratches and fingerprints. | Approve a physical color and surface sample before bulk production. |
| Function | Edge and corner safety | Rounded or softened edges are preferred for repeated handling and tabletop use. | Reduce sharp edges, flash, and burrs that could affect comfort or damage table surfaces. | Include visual inspection and hand-feel inspection in the quality checklist. |
| Function | Load and stability test | The rack should support a complete row of tiles without visible bending, sliding, or tipping under normal use. | Test with the buyer’s actual tile dimensions and approximate tile quantity. | Define the test method, loading time, and acceptable deformation before production. |
| Customization | Color customization | Custom colors can usually be matched against a physical standard or a recognized color reference system. | Color consistency can vary between production batches and different plastic resins. | Approve a signed color sample and specify an acceptable color tolerance. |
| Customization | Logo and marking options | Common methods include molded-in marks, pad printing, screen printing, laser marking, and adhesive labels. | Molded-in marks are durable; printed marks may require additional abrasion testing. | Confirm artwork format, print position, mark size, and intellectual-property authorization. |
| Customization | Tooling requirement | A new rack shape generally requires a dedicated injection mold; simple color changes normally do not. | Tooling affects lead time, initial cost, maintenance, and ownership terms. | Clarify mold ownership, storage period, revision charges, and release conditions in writing. |
| Quality Control | Dimensional tolerance | Injection-molded dimensions require a product-specific tolerance; a commonly discussed starting point is about ±0.2–0.5 mm for small non-critical features. | The final tolerance depends on resin, mold design, part size, and measurement method. | Use an approved technical drawing and calibrated measuring equipment. |
| Quality Control | Visual inspection | Inspect for warping, short shots, sink marks, flash, cracks, color variation, contamination, and printing defects. | Define critical, major, and minor defects before the final inspection. | Use an agreed inspection level and an approved sample limit. |
| Packaging | Individual protection | Polybag, paper sleeve, molded insert, or recyclable paper separation can be used according to the product and sales channel. | Retail presentation requires more protection than bulk commercial packaging. | Check abrasion, deformation, moisture exposure, and unpacking convenience. |
| Packaging | Export carton configuration | Typical export cartons may contain approximately 24–100 rack sets, depending on unit size, inner packaging, and carton weight limits. | Higher carton quantities reduce packaging cost but increase handling weight and potential damage risk. | Confirm units per carton, net weight, gross weight, carton dimensions, and carton marks. |
| Packaging | Carton strength | Use a suitable corrugated export carton and verify compression and drop performance for the selected shipping route. | Long-distance sea transport requires protection against stacking pressure, vibration, and humidity. | Perform a pre-shipment carton and drop test using the final packed configuration. |
| Shipping | Recommended transport mode | Sea freight is generally suitable for larger orders; air freight or courier service is suitable for samples and urgent small shipments. | Compare total landed cost, delivery time, dimensional weight, and customs requirements. | Request freight quotations based on the final carton count and packed dimensions. |
| Shipping | Incoterms® 2020 | Common quotation terms include EXW, FOB, FCA, CIF, and DDP, depending on the transaction structure. | The selected term determines which party manages transport, insurance, customs, and delivery risk. | State the named place or port and confirm whether import taxes are included. |
| Customs | Product classification | Plastic mahjong racks may be classified under a national tariff heading for plastic articles or game accessories; the correct code varies by importing country. | Incorrect classification can cause delays, reassessment, or additional duties. | Confirm the tariff code with the destination customs authority or a licensed customs broker. |
| Compliance | Material and chemical documentation | Depending on the market and intended use, buyers may request a material declaration, test report, restricted-substance statement, or safety documentation. | Requirements differ between adult recreational products, children’s products, and promotional merchandise. | Identify the destination-market rules before finalizing materials and coatings. |
| Commercial Terms | Minimum order quantity | Stock colors and standard designs generally allow smaller quantities; customized colors, printing, or new molds usually require higher quantities. | MOQ should be evaluated together with tooling, packaging, and inventory costs. | Obtain separate quantities for samples, stock production, custom production, and repeat orders. |
| Lead Time | Production planning | Standard items are normally faster than custom molded items. New tooling adds design, sampling, mold-making, testing, and approval stages. | Allow additional time for public holidays, color approval, packaging approval, and inspection. | Request a milestone schedule covering artwork, sample, tooling, production, inspection, and dispatch. |
| Sustainability | Recyclability and packaging reduction | Single-material plastic parts are generally easier to sort than products combining several bonded materials; paper-based packaging can reduce plastic packaging use. | Recyclability depends on local collection and recycling infrastructure. | Ask for resin identification, recycled-content details, and packaging material specifications. |