Mold making Process
The mold for a delicate artwork usually consists of two parts: A soft rubber mold, which captures the fine details of the sculpture, and a hard, so called "mother mold", which supports the shape during the casting process.
I chose a sturdy poly(urethane) rubber mold. The liquid rubber is applied layer by layer. Each layer follows the previous layer within a defined window of time, allowing, but not over exceeding, a certain degree of hardening of the rubber material.    
I chose a sturdy poly(urethane) rubber mold. The liquid rubber is applied layer by layer. Each layer follows the previous layer within a defined window of time, allowing, but not over exceeding, a certain degree of hardening of the rubber material.    
The proper arrangement of the seams is very crucial. For this mold I decided on two seams: one following the curve of Harmonie's hair and the other following her arm toward her chin. This selection will guarantee a smooth dismantling process of the final cast, balancing the stiffness of the rubber against the curvature of the artwork.
The proper arrangement of the seams is very crucial. For this mold I decided on two seams: one following the curve of Harmonie's hair and the other following her arm toward her chin. This selection will guarantee a smooth dismantling process of the final cast, balancing the stiffness of the rubber against the curvature of the artwork.

pictures 1 and 2 Rubber mold in progress


pictures 1: 4 layers of rubber applied. The color of the seam material is here easily  distinguished from the clay sculpture.

pictures 2: Final coating.
Hemp and molding plaster make up the mother mold. A careful selection of the number of mold parts and connection by seams is particularly crucial. It takes only minor undercuts and the hard, inflexible mother mold will not open and release  the cast.
Hemp and molding plaster make up the mother mold. A careful selection of the number of mold parts and connection by seams is particularly crucial. It takes only minor undercuts and the hard, inflexible mother mold will not open and release  the cast. Hemp and molding plaster make up the mother mold. A careful selection of the number of mold parts and connection by seams is particularly crucial. It takes only minor undercuts and the hard, inflexible mother mold will not open and release  the cast. Hemp and molding plaster make up the mother mold. A careful selection of the number of mold parts and connection by seams is particularly crucial. It takes only minor undercuts and the hard, inflexible mother mold will not open and release  the cast.
Facing so much work, it's always good to rely on four more helping paws
Katzu

 

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