Quante Argille Esistono? 4 Argille per Ceramica per Bassa Temperatura + TEST SMALTO.

CeramicaPerTutti

4 Apr 202106:13

Summary

TLDRIn this informative video, the host aims to address two frequently asked questions: which clay to use for beginners in ceramics, and the differences between clay types. The video focuses on four low-temperature clay varieties from Colorobbia: white earthenware, white semi-refractory raku clay, classic gray terracotta clay, and pyrophilic clay. The host delves into the characteristics, properties, and suitable applications of each clay type. To further illustrate the differences, a practical test involving crystal glazing on two clay types is performed, showcasing the varying results. The video provides valuable insights to help viewers make informed decisions based on their individual preferences and project requirements.

Takeaways

🏺 The choice of clay depends on the intended purpose and project type (e.g., hand-building, wheel-throwing, jewelry making).
🌐 The video covers four types of low-temperature clays: white earthenware from Colorobbia, white semi-refractory raku clay from Sil'Argilla, gray earthenware from Colorobbia, and pyrophilic clay from Colorobbia.
🎨 White earthenware is plastic, lightweight after firing, and ideal for decorations like engobes, underglazes, and crystalline glazes due to its white background.
🔥 The white semi-refractory raku clay is structurally solid, suitable for larger objects, resistant to thermal shock, and good for raku firing.
🧱 The gray earthenware fires to a terracotta color and is versatile for various purposes, including crystalline glazes (though decorations may appear darker).
🍲 The pyrophilic clay is suitable for cookware that can withstand direct and indirect flame contact.
🌈 Clays can be mixed to create new blends, but their properties may change, so experimentation is necessary.
💡 A glaze firing test is conducted on a red and a white clay piece, demonstrating how the background color affects the vibrancy and tone of decorations.
🤔 The choice of clay ultimately depends on personal preferences, project requirements, and the desired decorative effects.
📢 Viewers are encouraged to subscribe, turn on notifications, like, and share the video for more ceramic content.

Q & A

What types of clay are discussed in the video?
-The video discusses four types of low-temperature clay: white terracotta from Colorobbia, white semi-refractory clay for raku from Sil'argilla, gray stoneware clay from Colorobbia, and pyrophilic clay from Colorobbia.
What is the main advantage of the white terracotta clay from Colorobbia?
-The main advantage of the white terracotta clay from Colorobbia is that it is very plastic and easy to work with, both for hand modeling and on the pottery wheel. Additionally, after firing, it becomes very lightweight, making it ideal for small objects or jewelry.
What is the key characteristic of the white semi-refractory clay for raku from Sil'argilla?
-The key characteristic of the white semi-refractory clay for raku from Sil'argilla is that it is extremely resistant to thermal shock, making it suitable for raku firing techniques.
What is the primary use of the gray stoneware clay from Colorobbia?
-The gray stoneware clay from Colorobbia is the most versatile clay discussed in the video. It can be used for any purpose, including hand modeling, pottery wheel work, and various glazing and decorating techniques, except for raku firing.
What is the main advantage of the pyrophilic clay from Colorobbia?
-The main advantage of the pyrophilic clay from Colorobbia is that it can be used for making cookware and other objects that can come into direct or indirect contact with flames, as it is designed to withstand high temperatures.
Can these different types of clay be mixed together?
-Yes, the video mentions that all four types of clay can be mixed together to create new clay bodies. However, it also cautions that the resulting clay may not maintain the same characteristics as the original clays, and testing is necessary to determine the properties of the new blend.
What is the purpose of the firing test conducted in the video?
-The firing test conducted in the video aims to demonstrate the differences in the appearance of crystalline glazes when applied to two different clay bodies: the gray stoneware clay and the white semi-refractory clay for raku.
What is the main observation from the firing test?
-The main observation from the firing test is that the decorated patterns and colors appear brighter and more vivid on the white clay body compared to the reddish-brown clay body, where the colors appear slightly darker.

Outlines

00:00

🎥 Introduction to Different Clay Types for Ceramics

The speaker aims to answer two frequently asked questions: which clay to use for starting ceramics, and the differences between clay types. They mention that the choice depends on the intended purpose. The video focuses on four types of low-temperature clays. The speaker introduces a white earthenware clay from Colorobbia, highlighting its plasticity for hand-building and wheel-throwing, lightweight after firing, suitability for underglaze decorations, and compatibility with crystalline glazes. The second clay is a white semi-refrattaria raku clay from Sila Argille, known for its structural solidity, raku firing capabilities, and shock resistance. The third clay is a classic grey terracotta clay from Colorobbia, suitable for all purposes except raku firing, and economical. The fourth clay is a pyroplastic clay from Colorobbia, designed for cookware and direct flame contact.

05:01

🔥 Crystalline Glaze Test on Different Clay Bodies

The speaker conducts a crystalline glaze test on two clay bodies: a grey terracotta clay and a white semi-refrattaria raku clay from Sila Argille. The test pieces were bisque-fired, underglazedecorated with the same design, and then glaze-fired with crystalline glaze. The results show that the decoration appears brighter and more vibrant on the white clay background compared to the darker terracotta clay. The speaker concludes that there is no single better clay, as the choice depends on the intended purpose, the desired object, and the type of decoration. The video ends with a call to subscribe, like, and share if the viewer enjoyed the content.

Mindmap

Keywords

💡Argilla (Clay)

Argilla, or clay, is a key material in ceramics. The video explains different types of clay and their properties. Clay is essential for creating ceramic objects, whether by hand-building, throwing on the potter's wheel, or other techniques. The script highlights four specific low-fire clay bodies: white earthenware, semi-refractory raku clay, terracotta clay, and pyrolithic clay.

💡Plasticità (Plasticity)

Plasticità refers to the workability and malleability of clay. The video mentions that the white earthenware clay from Colorobbia is highly plastic, making it suitable for both hand-building and wheel-throwing. Plasticity is an important characteristic that enables shaping and forming clay into desired shapes and objects.

💡Temperatura di cottura (Firing Temperature)

Temperatura di cottura, or firing temperature, is a crucial factor in ceramics. The video focuses on low-fire clays, which are fired at lower temperatures compared to high-fire clays. The firing temperature affects the properties of the finished ceramic, such as color, porosity, and vitrification. Different clays have varying recommended firing temperatures, which the ceramist must consider when planning the firing process.

💡Raku

Raku is a Japanese ceramic firing technique that involves quickly removing the piece from the kiln while still hot and placing it in a container with combustible materials, creating unique surface effects and crackle patterns. The video mentions that the semi-refractory white clay from Sila Argille is suitable for raku firing due to its thermal shock resistance.

💡Ingobbio (Engobe)

Ingobbio, or engobe, is a decorative slip or liquid clay mixture applied to the surface of a ceramic piece before firing. The video suggests using the white earthenware clay as a suitable base for engobe decorations due to its light color. Engobes can create various surface textures and colors on ceramic pieces.

💡Cristallina (Crystalline Glaze)

Cristallina, or crystalline glaze, is a type of glaze that develops crystalline formations during the firing process, creating unique surface textures and patterns. The video demonstrates a test firing with crystalline glaze on two different clay bodies, showcasing the impact of clay color on the final glaze effect. Crystalline glazes are often prized for their aesthetic appeal and distinctive appearance.

💡Schamottato (Grog)

Schamottato, or grog, refers to pre-fired clay that has been ground into particles and added to a clay body. The video mentions that the semi-refractory raku clay from Sila Argille contains grog, which contributes to its structural strength and resistance to thermal shock. Grog is commonly used to increase the durability and thermal shock resistance of clay bodies.

💡Modellazione manuale (Hand-building)

Modellazione manuale, or hand-building, refers to the process of creating ceramic objects by shaping and forming clay using hands and basic tools, without the use of a potter's wheel. The video highlights that all four clay bodies discussed can be used for hand-building, allowing for a wide range of creative possibilities in forming and sculpting clay by hand.

💡Tornio (Potter's Wheel)

Tornio, or potter's wheel, is a essential tool in ceramics for creating symmetrical, round objects. The video discusses the suitability of the various clay bodies for wheel-throwing, noting differences in plasticity and abrasiveness. Working with clay on the potter's wheel requires specific techniques and skills, and the choice of clay body can impact the throwing process.

💡Pirofila (Ovenware)

Pirofila refers to ovenware or cookware ceramics that can withstand direct exposure to flames or high heat. The video introduces the Colorobbia pyrolithic clay, specifically formulated for creating cookware and kitchenware ceramics. This clay body is designed to be durable and heat-resistant, making it suitable for functional pottery intended for use in ovens, on stovetops, or over open flames.

Highlights

The speaker aims to answer two frequently asked questions: which clay to use for beginners in ceramics, and what are the differences between clays.

The speaker will focus on four types of low-temperature clays.

White earthenware clay from Colorobbia is plastic and lightweight after firing, suitable for small objects and jewelry.

White semi-refractory raku clay from Sil'Argille is structurally solid, resistant to thermal shock, and good for raku firing.

The classic gray clay from Colorobbia fires to a terracotta color and is versatile for various purposes, except raku.

Pyrophilic clay from Colorobbia is suitable for cookware and direct flame contact.

These four clays can be mixed to create new blends, but their original characteristics may change.

The speaker will test the gray and raku clays with the same decoration and crystalline glaze to observe the differences.

The decoration appears more vivid and lighter on the white clay compared to the terracotta clay.

There is no better clay; the choice depends on the intended object, decoration, and personal preference.

The speaker encourages viewers to subscribe, like, and share the video.