Description of sculpture molds mold making rtv2 liquid silicone rubber
rtv2 liquid silicone rubber MCSIL-B225 is a two-component material, consisting of Part A base and Part B MCSIL-CA30, cures at room temperature by a condensation reaction. It is super silicone liquid rubber material for brushing-on sculpture molds making because of its high viscosity .
Advantages of sculpture molds mold making rtv2 liquid silicone rubber
1. Good flow ability and long working time
2. High duplication times
3. High tear and tensile strength
4. Easy de-mould from complex replica parts
5. Acid and alkali-resistance
6. Low linear shrinkage
7.high viscosity and no deformation
Application of sculpture molds mold making rtv2 liquid silicone rubber
rtv2 liquid silicone rubber MCSIL-B225 is excellent mold making material for gypsum,plaster,concrete,resin crafts sculpture,statue.
The procedure and instruction of brushing:
Step 1 Handle the original mold
Choose a prefect original mold, Manually polish and smooth the model, clean the surface and dry it.
Step 2 Clay & mold-line
Choose the right parting mold-line, then it is better for us to draw the mold-line on the model.
Put the fixed model on flat wooden board. Then cover one part of mold line with clay, and the other part is exposed . Coating a layer of mold release agent on the exposed part.
Step 3 Weight part A & part B
Weight part A & part B according to the mix ratio(100:2) recommended
Eg: Take 100g part A and 2g part B
Step 4 Stirring evenly
Remember to mix part A and part B evenly, otherwise the silicon rubber will be partly solidified and this will bring problems in your final operation.
Step 5 Vacuum pumping
For releasing the air bubbles, after mixing evenly, put the mixture into vacuum pumping for 3-5 minutes, this step takes less than 10 minutes. Otherwise, it will cause cross linking reaction, and no more further steps will be available.
Step 6 First layer
Evenly brush the first layer of mixed silicon rubber on the model. Normally the first layer is brushed thinly to cover the model and the clay. it should not be too thick.
Step 7 Second layer
Brush the second layer of silicon rubber till the first one is cured. Normally the second layer should be 3-5mm, Cover a gauze or cloth on it when the second layer's cross linking reaction goes on, and use a brush pen or a brush to avoid any interstices. Evenly brush the third layer of mixed silicon rubber on the gauze or cloth .
This step will longer the mold using age, tear-strength, tension strength and duplication times.
Step 8 Outer molding
Way 1: Make a square frame with four pieces of wooden boards, put the cured silicone mold in the square frame, then pour the mixed liquid plaster into the frame
way 2: brush a layer of plaster on the cured mold.
PACKAGE :
Part A base silicone: 20kg,25kg/drum or 200kg/drum
Part B CA30 Curing Agent: 800g/bottle, 1kg/bottle
Storage and Precautions of Plaster Mould Making Silicone Rubber:
Plaster Mould Making Silicone Rubber is an environmentally-friendly liquid silicone product, is not easy to burn and can be stored and transported as non-hazardous goods. The shelf life of the product is about one year from the date of production. Inspection is required when exceeding the time limited. It can continue to be used in case of neither thickening nor deterioration.
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