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The most critical factor is the material composition. For resin and candle crafts, Food-Grade Liquid Silicone is preferred due to its high flexibility and tear resistance. Ensure the silicone has a Shore A Hardness rating suitable for the specific craft (typically 20-30 Shore A for easy demoulding). For concrete or plaster, look for thick-walled PVC or heavy-duty silicone to prevent deformation under weight.
Professional suppliers should provide a Technical Data Sheet (TDS). For baking or candle making, the mould must withstand temperatures from -40°C to +230°C. For resin casting, the material must be chemically inert to prevent the mould from 'fusing' with the resin during the exothermic curing process. Always request BPA-free and LFGB/FDA certification if the moulds are intended for food contact.
Look for moulds with a high-gloss internal surface; this ensures the finished resin or wax piece has a mirror-like shine without the need for polishing. Additionally, check for vacuum-de-aired silicone construction, which eliminates micro-bubbles in the mould walls that could cause surface imperfections on your products.
Yes, but it depends on the moulding method. For unique designs, CNC-machined aluminum master moulds have a higher upfront cost but offer extreme precision for mass production. For smaller batches, 3D-printed masters used to create silicone clones are more cost-effective. Most top-tier suppliers on Made-in-China.com offer custom logo engraving with a low MOQ (typically 50-100 pieces).
Request reinforced packaging. Silicone moulds can permanently deform if compressed for long periods. Ensure the supplier uses individual OPP bags and sturdy 5-layer corrugated export cartons with internal dividers. For large wholesale orders, insist on palletization to prevent crushing during sea freight.
Focus on the weight of the silicone rather than just the unit price. Some suppliers reduce costs by thinning the walls, which leads to mould distortion. Negotiate based on a fixed weight per unit and request a pre-shipment inspection report that includes a 'stretch test' to verify elasticity and durability.
Utilize Secured Trading Services provided by Made-in-China.com to protect your payment until delivery is confirmed. Verify that the supplier holds an ISO 9001 certification and check the HS Code (typically 3926.90 or 4016.99) to calculate accurate import duties and ensure compliance with your local customs regulations regarding plastic and rubber goods.
For orders under 100kg, Air Express (DHL/FedEx) is fastest for maintaining inventory turnover. However, for bulk wholesale (over 200kg), Sea Freight (LCL) or Rail Freight (for Europe) is significantly more cost-effective. Always clarify the Incoterms; FOB (Free On Board) is recommended for buyers who have their own freight forwarder to better control logistics costs.
