| Resin Material | Clear, fully cured resin with consistent hardness and no excessive tackiness. | Epoxy or polyurethane resin; material selection should match the intended display or educational use. | Request a material specification sheet and inspect sample pieces for curing, odor, and surface consistency. |
| Insect Detail | The insect form should be recognizable, proportionate, and free from major bubbles or distorted legs and wings. | Fine details may include body segments, antennae, wings, legs, and surface texture. | Use an approved reference sample and define acceptable limits for bubbles, missing details, and deformation. |
| Transparency and Clarity | Transparent areas should be visually clear, with no widespread cloudiness, yellowing, or visible contamination. | Clear, tinted, translucent, or opaque finishes can be specified according to the product design. | Check samples under consistent lighting and compare them with the approved color and clarity standard. |
| Surface Finish | The surface should be smooth, properly polished or evenly textured, without sharp resin flash or exposed edges. | Gloss, semi-gloss, matte, or textured finish. | Inspect edges and contact surfaces manually; define tolerances for scratches, pits, and uneven coating. |
| Color Consistency | Color should remain consistent across the production batch and match the approved sample. | Natural insect colors, custom colors, metallic effects, or transparent pigments. | Compare random samples from different cartons against a signed or retained reference sample. |
| Dimensional Accuracy | Dimensions should remain within the tolerance agreed in the purchase specification. | Typical small display pieces: approximately 20–100 mm in the longest dimension; custom sizes may vary. | Measure length, width, and height using calibrated tools and record results by sampling lot. |
| Curing and Durability | Finished pieces should resist normal handling without surface denting, cracking, or sticky residue. | Curing time depends on resin type, mold design, temperature, and product thickness. | Perform visual, touch, and handling checks after the supplier's stated curing period. |
| Bubble Control | No large bubbles should appear in prominent or structural areas; minor internal bubbles should follow the agreed sample standard. | Acceptance limits should be defined by bubble size, quantity, location, and visibility. | Inspect each visible surface under consistent light and photograph nonconforming examples. |
| Safety and Chemical Documentation | Documentation should identify resin components, handling precautions, and applicable market requirements. | Safety Data Sheet (SDS) for resin materials; additional testing may be required for children's products or direct-contact applications. | Request current SDS documents and confirm whether destination-country testing or declarations are required. |
| Packaging Protection | Individual pieces should be protected against scratches, impact, dust, and movement during transport. | Individual sleeves, compartments, foam, molded inserts, or protective wrapping inside export cartons. | Approve a packaging sample and conduct a carton drop or transport simulation when commercially appropriate. |
| Carton Marking | Outer cartons should show product code, quantity, handling marks, and destination information when required. | Carton information should match the packing list and purchase order. | Check carton labels, quantity per carton, gross weight, net weight, and carton dimensions before shipment. |
| Production Lead Time | The supplier should confirm a realistic schedule covering mold preparation, production, inspection, packing, and dispatch. | Often about 15–35 calendar days after sample approval for standard wholesale orders; custom tooling may require additional time. | Obtain a written production schedule and identify approval points for samples and packaging. |
| Inspection Plan | Inspection criteria should be documented before mass production, with clear classifications for critical, major, and minor defects. | Typical checks include appearance, dimensions, color, curing, quantity, packaging, and labeling. | Use pre-production, during-production, and pre-shipment inspections based on order risk and volume. |
| Batch Traceability | Each production batch should be identifiable through production date, product code, quantity, and inspection records. | Batch information may be recorded on cartons, packing lists, or internal quality documents. | Request retained samples and batch records for quality claims or repeat orders. |
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