| Defects in ceramics are of interest to potters and | | | | firing followed by a high-temperature glost or |
| ceramic manufacturers because they are a major | | | | gloss firing in the Porcelain Process.A |
| cause of financial loss. They are of interest to | | | | high-temperature firing followed by a low |
| collectors of ceramics because they may (or may | | | | temperature glost or gloss firing in the China |
| not) reduce the value of an item. They are of | | | | Process.A single high-temperature glost or gloss |
| interest to users especially if they can cause | | | | fire in the Stoneware Process.A single |
| damage or injury in use.I (being old and having | | | | lower-temperature glost or gloss firing in the |
| nothing else to do) decided to tell you what I | | | | Semi-vitreous Process.We will cover this topic in |
| remember about ceramic defects. I worked in the | | | | more detail in Ceramic and Pottery Defects 5: |
| ceramic industry for a good part of my life.To | | | | Defects Caused During Bisk Firing Operations.Glost |
| understand ceramic defects you should know | | | | Firing: Firing of glazed bisk ware (see also |
| something about ceramic processing. If you are a | | | | above).We will cover this topic in more detail in |
| potter or are involved in industrial ceramic | | | | Ceramic and Pottery Defects 6: Defects Caused |
| manufacturing you know about ceramic | | | | During Glazing and Glost Firing Operations.Decal |
| processing. For those of you who are not familiar | | | | Firing: Firing a decal or decals on ware.We will |
| with ceramic processing here is the listing of the | | | | cover this topic in more detail in Ceramic and |
| ceramic processes we will discuss in this series of | | | | Pottery Defects 7: Defects Caused During |
| articles on ceramic defects:Batching and | | | | Decaling and Decal Firing.Enamel Firing: Firing an |
| Formulating:Selecting a composition for the | | | | enamel usually on decaled ware.We will cover this |
| ceramic and then choosing raw materials for the | | | | topic in more detail in Ceramic and Pottery |
| batch.We will cover this topic in more detail in | | | | Defects 8: Defects Caused During Enameling and |
| Ceramic and Pottery Defects 2: Defects from | | | | Enamel Firing.Gild Firing: Firing gold or other precious |
| Raw Materials and Batching Errors.Forming or | | | | metal decorations.(Note: Now days, the decal may |
| Making: Shaping the part by slip casting, pressing, | | | | include enamel and gold so that a single firing can |
| hand forming, injection molding, roll forming, | | | | be used.)We will cover this topic in more detail in |
| jiggering, or any other of a number of ways | | | | Ceramic and Pottery Defects 9: Defects Caused |
| available.We will cover this topic in more detail in | | | | During Gilding and Gild Firing.John T. Jones, Ph.D. (, |
| Ceramic and Pottery Defects 3: Defects from | | | | a retired VP of R&D for Lenox China, is author of |
| Forming OperationsDrying: Controlled heating to | | | | detective & western novels, nonfiction (business, |
| dry the ware before firing (or just leaving it on a | | | | scientific, engineering, humor), poetry, etc. Former |
| shelf in Arizona).We will cover this topic in more | | | | editor of Ceramic Industry Magazine, Jones is |
| detail in Ceramic and Pottery Defects 4: Defects | | | | Executive Representative of International Wealth |
| Caused During Drying Operations.Bisque Firing (or | | | | Success. He calls himself "Taylor Jones, the hack |
| Bisk Firing) and Single Firing: A low-temperature | | | | writer. |