Milky white liquid silicone rubber specifically for plaster mold duplication
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Milky White Liquid Silicone Rubber for Plaster Model Casting For inquiries and orders of liquid silicone rubber, contact Ms. Chen at 13662816580 (same number for WeChat)
Using craft liquid mold silicone rubber to create plaster models is a common technique in handmade crafts and cultural creative design. The core process revolves around two main steps: "creating the silicone rubber mold" and "pouring plaster for molding." It requires precise control of material ratios, operation time, and environmental conditions to ensure the model's details are complete and the surface is smooth. Below is a detailed operation guide, material preparation, precautions, and solutions to common problems:
I. Core Materials and Tool Preparation
Prepare suitable silicone rubber, plaster, and auxiliary tools in advance. Material selection directly affects mold durability and plaster model accuracy:
| Category | Specific Items | Function and Selection Advice |
|---|---|---|
| Basic Materials | Craft Liquid Mold Silicone Rubber | Core mold material; prioritize two-component addition-cure silicone rubber (good fluidity, high number of casting cycles, suitable for fine textures). Avoid condensation-cure type (prone to shrinkage, affecting accuracy). Recommended hardness: 20-30 Shore A (moderate softness, easy demolding). |
| Plaster Powder (for models) | Choose high-strength plaster powder (e.g., α-type hemihydrate gypsum), which offers high strength and a fine surface after curing. Avoid construction plaster (low strength, prone to chalking). Recommended fineness: 200 mesh or above. | |
| Silicone Rubber Curing Agent (matching) | Addition-cure silicone rubber requires a dedicated curing agent. Ratio is typically silicone rubber : curing agent = 10:1 (by weight; strictly follow instructions; incorrect ratio may cause non-curing or brittle curing). | |
| Auxiliary Tools | Prototype (master model) | The "original" model to be reproduced. Materials can include resin, clay (must be dry and set), plastic, etc. Surface must be smooth and free of oil (otherwise, silicone rubber may not adhere). |
| Mold Frame (enclosure tool) | Custom-made from acrylic sheets, wooden boards, or plastic boxes. Height should be 1-2 cm higher than the prototype (to prevent silicone rubber overflow). Apply masking tape on the inner side (for easy removal later). | |
| Electronic Scale (accuracy 0.1g) | Essential for weighing silicone rubber and curing agent. Volume ratios are prone to errors and may cause curing failure. | |
| Mixing Stick (plastic/silicone), Measuring Cup | Mixing stick must be oil-free and dry. Use disposable plastic cups for measuring (to avoid material residue contamination). | |
| Release Agent (optional) | If the prototype has deep textures or tends to stick to silicone rubber, apply a thin layer of neutral release agent (e.g., diluted Vaseline). Plaster pouring does not require a release agent (plaster does not adhere to silicone rubber). | |
| Vacuum Pump (optional, improves accuracy) | Used to degas mixed silicone rubber (removes bubbles). Without a vacuum pump, gently shake the mold frame (reduces bubbles but with limited effect). | |
| Sandpaper (400-1000 grit), Craft Knife | Used for trimming silicone mold edges and sanding plaster model surfaces. |
| Industry Category | Chemicals/Organosilicon/Silicone Rubber |
|---|---|
| Product Category | |
| Brand: | 鴻風豪 |
| Spec: | HF-318 |
| Stock: | 5000 |
| Manufacturer: | |
| Origin: | China / Guangdong / Dongshi |
