Materials

What is a Material?

Strictly speaking, a Glazy Material is just a chemical analysis that represents a real-world raw material. The accuracy of the analysis may vary. The actual composition of each bag of your material may differ more or less from the analysis.

For more information, see Raw Materials.

Theoretical Materials

All material analyses are to some extent theoretical in that they approximate actual real-world materials. The actual materials we use in the studio come from various natural sources and contain impurities and inconsistencies. For example, there are many types of Potash Feldspar, and each type has a different analysis. Even within types of Potash Feldspar, there may be different analyses for different batches of material at different times. When working with actual materials in the studio, it’s best to use the most accurate analysis you can find for each material.

For more information, see Theoretical vs. Real Materials

Material Metadata

Subtype

Materials can be set as a subtype of one of the following values:

Alumina, Ash, Clay, Colorant, Miscellaneous, Feldspar, Flux, Frit, Opacifier, Silica

This list of subtypes was inherited from imported recipe data and are still used because no one has yet suggested a better list. The subtype is simply an organizational tool used to group materials together.

Parent Material

While not a required field, Parent Material is quite important for the functions of Glazy. Namely, this field is used to determine whether or not materials and the recipes that use these materials, are similar.

As an example, let’s look at the classic Leach 4321:

• 40 Potash Feldspar
• 30 Silica
• 20 Whiting
• 10 Kaolin

Now imagine you wish to make a batch of this recipe. You look everywhere in your studio for materials called “Potash Feldspar” and “Kaolin” but cannot find them. However, you do find “Custer Feldspar” and “EPK”, and you realize that these materials are types of Potash Feldspar and Kaolin, respectively. Your final recipe batch of Leach 4321 is:

• 40 Custer Feldspar
• 30 Silica
• 20 Whiting
• 10 EPK

While technically both of the above recipes are “Leach 4321”, they differ in both materials used as well as final chemical analysis. However, when comparing glaze recipes we often want to overlook slight differences in chemistry between similar materials (in this case, types of Potash Feldspar and Kaolin). That is not to say that these differences are not significant, and in fact some material substitutions may give quite different results.

In Glazy, materials are organized into a tree. In other words, materials can have parents and children. In the case above using Leach 4321, “Custer Feldspar” is the child of “Potash Feldspar”. Similarly, “EPK” is a child of “Kaolin”. This is because there are many types of “Potash Feldspar” and “Kaolin”, “Custer Feldspar” and “EPK” being just a couple of them.

When Glazy attempts to find similar base recipes, it does so using the immediate parent materials. In the above batch of Leach 4321:

• 40 Custer Feldspar (Parent: Potash Feldspar)
• 30 Silica (No Parent)
• 20 Whiting (No Parent)
• 10 EPK (Parent: Kaolin)

In this case, the recipe used for comparison is:

• 40 Potash Feldspar
• 30 Silica
• 20 Whiting
• 10 Kaolin

Obviously, this is the same recipe as our original Leach 4321. So Glazy recognizes these two recipes as equivalent.

When adding new materials to Glazy, it is advisable to specify a Parent Material if possible.

For example most Potassium Feldspars, the parent should be “Potash Feldspar” (owned by the Glazy Admin). If adding EPK, SSP, or Helmar Kaolin, the parent should be “Kaolin”.

Parent & Siblings

In the Material page you will see a Parent Material listed along with any Sibling Materials. Sibling Materials are simply materials that have the same Parent as the current Material. In the case below, Custer Feldspar’s Parent is Potash Feldspar, and its Siblings include other Potash Feldspars like Mahavir Potash Feldspar.

Privacy: Public vs. Private Materials

When you create a Recipe or Material in Glazy, it is unpublished and private by default. When you are ready to share your material with the world, you can click the Publish button. This will make your material public and searchable by other Glazy users. Before you publish, make sure the material is complete and accurate so that yourself and others can rely on it. Public materials are visible to everyone in the Glazy community and appear in search results. Private materials are only visible to you, the creator.

You can unpublish a Testing material at any time (making it private again), but once a material is set to Production or Discontinued, it cannot be unpublished if it was made public. This is to ensure that others who rely on your public material can trust that it will not disappear unexpectedly.

Status

Both Materials and Recipes have the same status system that represents a lifecycle from Testing to Production to Discontinued.

Testing

Testing indicates that a material is still in development and not actively used in the studio. It can still be modified or deleted. Be cautious when bookmarking other users’ public Testing materials, as they may change without notice.

Production

Production materials are considered well-tested and reliable. To ensure consistency for everyone using or bookmarking the material, Production materials are locked and cannot be edited or deleted after being marked as such. You can trust that these materials won’t change unexpectedly. A photo is required for a material to be marked as Production. Only materials with a status of Production appear in the default Glazy search results. Important: Once a material is marked as Production, its status cannot be changed back to Testing.

Discontinued

Discontinued materials are those you no longer use, perhaps because an ingredient isn’t available anymore or the material didn’t work as expected. Like Production materials, Discontinued materials are locked and cannot be edited or deleted once marked. Important: Once a material is marked as Discontinued, its status cannot be changed back to Testing.

Country

Often it can be useful to associate a material with a Country. While theoretical materials like “Feldspar” don’t have a location, others like “Mahavir Feldspar” is tied to a specific mine. Some ceramicists prefer to use locally-sourced materials, and the Country field can help guide them.

Create a Material

You can easily add your own materials to Glazy: