Omschrijving:
A natural seaweed-based powder. It is suitable for moulding complete items, soft or delicate objects or the human body. Adult beginners and enthusiasts.
Instructies:
Modelling clay
Applications:
When the piece is finished, let it air dry. It is recommended to fire in a ceramic kiln between 980 and 1050ºC (1800-1925 F) and to decorate it with glazes.
Remains unaltered in its original packaging conditions for a minimum period of 2 years. If the packaging does not suffer from deterioration, it is an imperishable product.
It is advisable to knead the Gedeo firing clay before starting work.
If the clay loses its plasticity or breaks up during the work, you can recover it by slightly moistening your hands.
If the clay dries completely, it can be recovered with water.
Gedeo firing clay is very easy to model, modeling can be assisted by spatulas and other appropriate modeling tools. It can also be molded (we recommend plaster molds) and especially turned on a potter's wheel.
To join two pieces of clay together, first scratch the parts to be joined with a spatula or a punch and with a brush, moisten with a slip (clay mixed with water until a liquid texture is obtained).
In the case of angled joints, reinforce the joint with a small clay roller by spreading it along the angle and then press and smooth the joint with a spatula.
To smooth and polish surfaces, use a damp sponge.
To make hollow objects, rigid or flexible supports can be used.
⚠ If the paste is used by wrapping rigid interior supports (of metal, plastic, wood or plaster), it is recommended that the support be covered with a layer of paper or canvas to promote the contraction of the clay during drying and prevent the appearance of cracks.
⚠ When joining 2 pieces of clay together, try to have their moisture (hardness) similar. If not, the softer piece will contract more during the drying process and come off the harder piece.
Conservation:
Once the package is opened, wrap the remaining Gedeo firing clay in plastic.
If the clay dries completely, it can be recycled by mixing and kneading with water.
During interruptions in work, cover the object with plastic or a damp cloth.
Do not store at temperatures below 0ºC. If the product freezes, it will lose its elasticity.
Drying :
Once the object is finished, let it dry evenly, avoiding direct heat sources and drafts. The slower it dries, the less chance there is of cracks appearing.
It is recommended to let the object dry on a porous surface (paper, wood, porous ceramic, plaster or fabric).
If the piece is larger or massive, it is recommended to delay the drying process by covering the piece with plastic with a slight opening to allow a slow evacuation of moisture.
If the piece is completely flat (plate or tile), it is recommended to let it dry with a flat weight on top. This will prevent the piece from twisting or cracking from the inside if drying is rapid.
The speed of drying of Gedeo firing clay will depend on the size of the piece, its shape and thickness, and the environmental conditions during drying (temperature and ventilation): drying between 2 and 5 days at room temperature,
During the drying process, Gedeo modelling clay shrinks (drying shrinkage).
The more water the clay contains, the greater the drying shrinkage.
Finishing :
Once dry, the object can be polished, tiled or drilled before decoration.
Baking :
Modelling Gedeo clay in a ceramic kiln at the following temperatures is optimal:
1000ºC for red firing clay
1050ºC for white firing clay
During the firing process, the object is subject to a slight reduction in size: shrinkage due to the firing process.
In the case of larger or massive pieces, it is recommended to perform a slow preheating between 150ºC and 200ºC with the kiln door slightly open (not tightly closed). This will help the drying moisture to evaporate completely.
Waterproofing clay
Filling, the waterproofing agent perfectly coats the surface to be covered. Fluid, it is very penetrating for a better sealing. Its temporary coloring facilitates application.
Modelling paste
To obtain a smooth finish, apply terebentine with a brush or finger on the model to be molded.
Place the model paste near a heat source to soften it and make it easier to work.
Non-firing clay
Cleans easily with water on hands and clothes. A damp cloth easily removes any remaining product from surfaces and furniture.
Once dry, it can be painted or varnished. It can also be polished, tiled or perforated. It can be waterproofed after complete drying (4-5 days) to make waterproof non-food containers.
Remains unalterable in its original packaging conditions for a minimum period of 2 years.
Applications:
It is recommended to knead the clay before starting the work.
If the clay loses plasticity, to recover it, it is enough to slightly moisten the hands.
Can also be molded (we recommend plaster molds) and turned in a potter's wheel.
To join two pieces of clay together, first scratch the parts to be joined with a spatula or a punch and then moisten with a brush using a slip (clay mixed with water until a liquid texture is obtained).
In the case of angled joints, reinforce the joint with a small clay roller, extending it along the angle and then press and smooth the joint with a spatula.
To join 2 pieces that are already dry, use conventional glue.
It is not recommended to join a dry piece with a wet one since the union will crack due to the contraction during the drying of the wet piece.
To smooth and polish surfaces to a very clean finish, use a damp sponge.
It is possible to make solid objects or very thin walls with optimal results.
To make hollow objects, it is possible to use rigid or flexible supports.
⚠ If the paste is used wrapping rigid inner supports (of metal, plastic, wood or plaster), it is recommended to cover the support with a layer of paper or canvas to promote the contraction of the clay during drying and prevent the appearance of cracks.
Conservation:
As long as it has not dried, Gedeo no-fire clay can be reused and stored indefinitely in a damp cloth inside a tightly sealed plastic bag.
During work interruptions, cover the object with plastic or a damp cloth.
Store product in a cool environment, avoiding high temperatures.
Do not store below 0ºC. If the product freezes, it will lose its properties.
Drying :
Once the object is finished, let it air dry.
Maximum hardness and resistance are obtained between 4 and 5 days at room temperature.
Drying can be accelerated by exposing the objects to a heat source. It is possible to increase the hardness by finalizing the drying in a domestic oven between 100 and 110ºC.
During the drying process, the unfired clay shrinks. The more water the clay contains, the greater its shrinkage during drying.
In case of realization of very large pieces or very difficult drying, it is recommended to model the clay after having let it dry slightly and homogenize through kneading.