What is stamping?
Stamping is a shaping technique widely used in ceramics.
The stamping technique consists of applying plastic clay (paste) to the walls of a mold, usually made of plaster .
This technique is often used for mass production . Indeed, the mold allows for the creation of identical shapes in multiple copies. Using a mold makes it possible to quickly produce and reproduce the same shape.
The stamping mold can be lined with a slab of clay previously spread using a roller or a cruster.
If the shape of the mold is more complex, it can be filled in small pieces of clay, like "balls".
The stamping of the parts can be done in a hollow mold or a raised mold .
It is also possible to create stamped shapes with a multi-part mold.
Plate stamping step by step:
Plate stamping is generally used to create simple shapes using hollow or embossed dies.
- Spread the clay using a roller or a clay spreader. The clay slab should be larger than the imprint to be made.
- Place the clay slab in the mold.
- Gently and evenly press the plate against the sides of the mold using a damp sponge.
- Smooth and even out the thickness of the soil with a trowel.
- Cut off the excess soil with a knife
- Smooth the edges with a sponge
- Allow to dry and unmold at a leather-like consistency.
Stamping in multi-part molds:
For more complex shapes , the stamping technique is carried out in multi-part molds.
1. Fill the different parts of the mold with plastic clay
2. Apply slip to the clay at the joint lines
3. Assemble the different parts of the mold
4. Press the mold to stick the elements together and push out the excess clay.
5. Let it dry, then unmold.
6. Clean the seams using a tool (sewing tool, awl, sponge)
The mold: the central element for the stamping technique:
The fundamental tool in the stamping technique is the mold .
Stamping molds are most often made of plaster. This material has advantages such as its porosity, allowing it to absorb moisture from the clay .
Plaster allows for the creation of fine and precise molds.
Although plaster is the most commonly used material for making molds, it is possible to use other materials as a support.
Embossed molds can be made of wood , such as the molds offered by Pottery Forms Europe , which are made of wood (MDF).
Polystyrene molds can also be an alternative to plaster molds.
These materials are primarily used for the plate stamping technique.
The essentials:
For controlled stamping, certain tools and equipment are essential :
Ceramic stamping: a professional approach
Ceramic stamping allows for a balance between technical requirements , repeatability of forms , and artisanal quality . It integrates perfectly into a reasoned production approach, whether for limited series, decorative pieces, or architectural applications.
With With the right ceramic tools and materials , pottery stamping becomes a real lever for control and consistency in a professional workshop.
