Your Guide to Buying Ceramic Glaze on eBay

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Your Guide to Buying Ceramic Glaze on eBay

Making pottery is a good way to spend your spare time because not only is it fun, but it often results in beautiful items that you can use in your home, sell, or give away as presents. You can also engage your children in pottery making, in order to enhance their creativity and give them something to do. Moreover, making pottery with friends is a great way to enjoy each other's company. Whatever the reasons for your interest in ceramics and pottery making, you need to have the best tools and materials available so that you can produce high-quality dishes, vases, and other objects.

Once you have shaped the object, you may want to waterproof or decorate it. You need ceramic glaze for these purposes. Ceramic glaze is a vitreous substance that you put on the surface of your pottery. The glaze forms a decorative coating that is also functional, thanks to its imperviousness. When buying ceramic glaze, you should consider the available types, either ready-mixed or powder, as well as the finishes and other qualities. You can shop for many types of ceramic glaze on eBay, without even leaving the comfort of your home.

Types of Ceramic Glaze

Ceramic glaze is divided into types based on its composition. It can either be a pre-mixed emulsion, also known as wet glaze, or a dry powder that needs to be mixed with water. Glazes can also be characterised and classified by the way they are applied: either under or over other glazes or decorations. You can buy any of these types of glaze on eBay.

Wet Ceramic Glaze

Wet ceramic glaze comes ready for use, and is therefore preferred by many people. Because it does not require mixing, it is perfect for beginners. You can use wet ceramic glaze for brushing your pottery, as it has certain components that make it easy to apply on surfaces. The chemicals in the glaze ensure that the particles remain in suspension. Wet ceramic glaze is fired at lower temperatures than dry ceramic glaze.

Dry Ceramic Glaze

If you are using dry ceramic glaze, you first have to make it from the glaze powder. Mix the dry glaze with water and then sift it with a sieve in order to ensure a smooth consistency by removing any lumps. You can buy a large bag of the dry powder and then mix it with water in small portions as you need it. Dry glaze can be poured onto your pottery, or the pottery can be dipped into it. With a brush, it can be applied on the pottery just like wet glaze.

Underglaze

The underglaze is the base coat that you apply directly onto your pottery. Underglazes come in many colours, and sometimes the process of decorating pottery ends with their application. However, they can also be coated with layers of translucent or clear gaze. Underglazes can be fired in the oven together with the clay, because they have low drying shrinkage. This means that the design created on the pottery retains its shape and dimensions. Underglazes change the colour of the clay, and can also be used in order to change the texture of your ceramic items. The term "underglaze" is also used to refer to a design or colour that is applied onto the pottery before the glazing process.

Overglaze

The overglaze is the second glaze applied onto the pottery, although it also denotes a design or decoration that is applied through its use. Overglazes are generally decorative besides being protective. For instance, they can be used to create a glitter effect. Before you apply overglaze, make sure that the ceramic item is clean and dust-free.

Ceramic Glaze Features

Besides choosing a type of the ceramic glaze, you should consider various features before buying ceramic glaze on eBay. The components of any ceramic glaze largely determine their colour as well as their opacity, melting temperature, and surface quality.

Ceramic Glaze Components

Basically, ceramic glaze is composed of glass. This special glass hardens and creates a protective surface on your pottery. Compounds used in ceramic glaze include silicates, oxides, aluminates, tin, potassium, iron, lead, copper, and sodium, among many others. The colourants in glazes are derived from an variety of metals. The following chart lists the metals used for colouring the ceramic glazes.

Colourant

Colour

Uranium or vanadium

Yellow when mixed with lead

Tin

Soft opaque blue; only 5-10 per cent required in a solution

Nickel

Brown and cream when mixed with magnesium in oxidation; grey/green in reduction

Manganese

Browns in a lead solution, violets and purples in an alkaline solution

Iron

Pale honey to black; lots of variations

Chrome

Greens; strong red and pink when mixed with tin

Copper

Bottle green when mixed with lead; turquoise in oxidation; deep red in reduction

Cobalt

Rich blue; green when mixed with titanium oxide

When using glazes, you should also be aware that they may change their colours during the firing process. If you need your pottery to have a certain colour, always read the label on the glaze in order to find out how it transforms when exposed to high temperatures. If you are advanced at pottery-making, you may choose to add the colourants yourself.

Opacity of Ceramic Glaze

The opacity of ceramic glaze refers to its degree of transparency or translucency. Glazes that are partially or completely opaque contain trapped air bubbles or tiny particles in their suspensions. In fact, many white glazes are white not because of any colourants, but because of their opacity. The opacity of ceramic glaze depends on the minerals found in the glaze. You can transform transparent glazes into opaque ones by adding certain opacifiers. These include zirconium silicate, tin oxide, titanium dioxide, and bone ash. If you use any of the opacifiers, you can get more out of a set of ceramic glazes.

Melting Temperature of Ceramic Glaze

Different ceramic glazes have different temperature ranges, and it is important to know what temperature is needed in order to melt a particular type of glaze. You should always consider the melting temperature, because a glaze only melts and matures when it is heated at the correct temperature for its type. Moreover, if you apply too much heat, the glaze can become too fluid and can run off the pottery.

Surface Quality of Ceramic Glaze

The surface quality is a matter of the way the ceramic glaze looks after it has been fired. Most ceramic glazes are shiny and glossy, but it is also possible to create satiny and matte finishes. If you have a glossy glaze, you can transform it into matte by adding agents such as lithium carbonate, strontium carbonate, barium carbonate, alumina hydrate, lithium carbonate, and titanium dioxide. If you add bone ash or titanium dioxide, you can obtain an opalescent glaze that looks different under different light conditions. Some glazes even have a rough texture.

Finding Ceramic Glaze on eBay

The easiest way to find ceramic glaze on eBay is to search for it by using the keywords "ceramic glaze". This search will produce hundreds of results, which you can then further narrow down by sorting in terms of auction time or price. You may also include the manufacturer or the colour in your search terms if you favour a certain maker or already know what kind of colour you require. If the manufacturer or the colour do not play a significant role, you can make do with a more general search.

Once you see the list of results, you can also check the item's condition. Most ceramic glaze is sold as new, but even in the case of new ceramic glaze, you should check the expiry date. This may be shown in the photos included in the item listing. If you cannot find the information you need, you can always ask the seller. A good seller will be able to answer any questions you may have, and may even be able to provide some extra tips about how best to use the ceramic glaze. In order to find top-rated sellers who have high ratings and positive feedback, you can check the box that you find when you perform your keyword searches.

Conclusion

If you are interested in pottery, you have found a hobby that is both fun and practical, because you can create pieces that you can use in your home, give away to your friends, or even sell. In order to waterproof and decorate your pottery, you need ceramic glaze, a vitreous substance that is applied to the surface of the pottery.

Ceramic glazes are divided into types by their composition, and they are wet and dry, respectively. Wet glaze is easier to use and it is therefore quite popular, especially with beginners, but you can also choose to mix your own glaze with a dry powder. Glazes can also be divided and classified in terms of whether they are overglazes or underglazes, according to the order in which the glaze is applied to the pottery.

Ceramic glaze is composed of glass that hardens and creates a protective surface. Glazes contain many compounds, and their metal components determine the colour of the glaze. The components of the glaze also influence its opacity, melting temperature, and surface quality. By adding certain components, you can change the features of the glaze. You can find an array of ceramic glazes, and information about them, on eBay.

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