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