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Matt Katz

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  1. Like
    Matt Katz got a reaction from Seija in Leaching & Unsafe Glaze Surface   
    There is no corelation between Matte glazes and food saftey. A properly formed Matte Glaze is a gloss glaze that crystals form in upon cooling. This is a result of composition and an abundance of Alumina and Calcium (or other Alkaline Earths) in your glaze matrix. Because of this, a properly composed matte is food safe.
    Improperly formulated mattes are under fired and can be non-food safe
  2. Like
    Matt Katz got a reaction from D.M.Ernst in The truth about crazing   
    Hi All, 
    I've just posted my newest video about what really causes crazing, what are the issues with crazing and some solutions for avoiding it in the long term. 
     
    I hope you like it! 
     
    [Video removed by moderators, due to its advertising content. You can visit Matt's website to view the video.]
     
  3. Like
    Matt Katz got a reaction from Workhouse Ceramics Program in The truth about crazing   
    Hi All, 
    I've just posted my newest video about what really causes crazing, what are the issues with crazing and some solutions for avoiding it in the long term. 
     
    I hope you like it! 
     
    [Video removed by moderators, due to its advertising content. You can visit Matt's website to view the video.]
     
  4. Like
    Matt Katz got a reaction from High Bridge Pottery in The truth about crazing   
    Hi All, 
    I've just posted my newest video about what really causes crazing, what are the issues with crazing and some solutions for avoiding it in the long term. 
     
    I hope you like it! 
     
    [Video removed by moderators, due to its advertising content. You can visit Matt's website to view the video.]
     
  5. Like
    Matt Katz got a reaction from Joseph Fireborn in Technical Understanding Of Clay And Glaze.   
    Hi Jospeh, 
     
    Have you ever glazed work before? Great, the class is for you. I've taught students with one class and masters with 50 years of experience. All love the class. 
     
    As to details. I am comprehensive and detailed. I've spent 20 years working in ceramic science, but I have a BFA and MFA. So I understand the needs of the artist and the knowledge of the scientists. i don't leave anything off the table. This is the same class I've been teaching at Alfred for 15 years, all facts, no rumors or myths. You'll love it. 
  6. Like
    Matt Katz got a reaction from Joseph Fireborn in Technical Understanding Of Clay And Glaze.   
    You're all linking to the same guy... and I'm that guy! 
     
    Seriously though, if you have any questions feel free to ask. (I'll try to remember to check back) 
     
    For those that don't know me. I been teaching glaze calc at Alfred for 15 years, and I've been teaching an academic version of my class, online for three years. 
    Starting July 1st, we will be offering our first version of the class for the general public. 
     
    You can find out more information, and sign up here
     
    http://www.ceramicmaterialsworkshop.com/glaze-calculation.html
     
    Best, 
    Matt
  7. Like
    Matt Katz got a reaction from Callie Beller Diesel in Technical Understanding Of Clay And Glaze.   
    You're all linking to the same guy... and I'm that guy! 
     
    Seriously though, if you have any questions feel free to ask. (I'll try to remember to check back) 
     
    For those that don't know me. I been teaching glaze calc at Alfred for 15 years, and I've been teaching an academic version of my class, online for three years. 
    Starting July 1st, we will be offering our first version of the class for the general public. 
     
    You can find out more information, and sign up here
     
    http://www.ceramicmaterialsworkshop.com/glaze-calculation.html
     
    Best, 
    Matt
  8. Like
    Matt Katz got a reaction from glazenerd in Technical Understanding Of Clay And Glaze.   
    You're all linking to the same guy... and I'm that guy! 
     
    Seriously though, if you have any questions feel free to ask. (I'll try to remember to check back) 
     
    For those that don't know me. I been teaching glaze calc at Alfred for 15 years, and I've been teaching an academic version of my class, online for three years. 
    Starting July 1st, we will be offering our first version of the class for the general public. 
     
    You can find out more information, and sign up here
     
    http://www.ceramicmaterialsworkshop.com/glaze-calculation.html
     
    Best, 
    Matt
  9. Like
    Matt Katz got a reaction from TallTayl in Have You Ever Wondered, Why Cone Temperatures Are Random?   
    Learn excatly how our cones work. here
     
  10. Like
    Matt Katz got a reaction from bciskepottery in Have You Ever Wondered, Why Cone Temperatures Are Random?   
    Learn excatly how our cones work. here
     
  11. Like
    Matt Katz got a reaction from GiselleNo5 in Have You Ever Wondered, Why Cone Temperatures Are Random?   
    Learn excatly how our cones work. here
     
  12. Like
    Matt Katz got a reaction from JohnnyK in Have You Ever Wondered, Why Cone Temperatures Are Random?   
    Learn excatly how our cones work. here
     
  13. Like
    Matt Katz got a reaction from D Walsh in Have You Ever Wondered, Why Cone Temperatures Are Random?   
    Learn excatly how our cones work. here
     
  14. Like
    Matt Katz got a reaction from MartinB in Have You Ever Wondered, Why Cone Temperatures Are Random?   
    Learn excatly how our cones work. here
     
  15. Like
    Matt Katz got a reaction from Laurarose in Takeglaze Calc Online Or Clay Bodies Online From Alfred University   
    Have you ever wanted to learn Glaze Calculation or Clay Science, but haven't had the opportunity? Alfred University is now offering our world renowned classes in clays and glazes online to everyone!
    Following in the footsteps of Val Cushing and Daniel Rhodes, I have spent over 15 years crafting a new version of our clay and glaze classes. Wherein I take the best research from Alfred's school of ceramic engineering and translate it for artists of all levels. They are the perfect courses if you want answers to those burning questions, If you teach these subject and need a refresher, or are a beginner and want to understand what is going on in your materials.
    The next session of both classes will be starting December 14th and run until January 15th. You can take the courses for academic credit. Or if you are a life long learner, you can audit the course for half the list price.
    See the attached pamphlet for some of our incredible reviews and more information. Or visit our website.
    http://art.alfred.edu/academics/glaze-formulation.cfm
     




  16. Like
    Matt Katz got a reaction from bciskepottery in Takeglaze Calc Online Or Clay Bodies Online From Alfred University   
    Have you ever wanted to learn Glaze Calculation or Clay Science, but haven't had the opportunity? Alfred University is now offering our world renowned classes in clays and glazes online to everyone!
    Following in the footsteps of Val Cushing and Daniel Rhodes, I have spent over 15 years crafting a new version of our clay and glaze classes. Wherein I take the best research from Alfred's school of ceramic engineering and translate it for artists of all levels. They are the perfect courses if you want answers to those burning questions, If you teach these subject and need a refresher, or are a beginner and want to understand what is going on in your materials.
    The next session of both classes will be starting December 14th and run until January 15th. You can take the courses for academic credit. Or if you are a life long learner, you can audit the course for half the list price.
    See the attached pamphlet for some of our incredible reviews and more information. Or visit our website.
    http://art.alfred.edu/academics/glaze-formulation.cfm
     




  17. Downvote
    Matt Katz got a reaction from Prokopp in Underglaze Under Clear Glaze   
    We have done extensive study on that here at Alfred and that is a common myth. Because of the high viscosity of glass and the low pressure of gases, this is impossible. Pinholes are caused by poor packing of the glaze particles. If you want the background, you can check out Dave Finkelnburg's NCECA talk from 2007.
  18. Downvote
    Matt Katz got a reaction from Prokopp in Lusters   
    Ok Everyone,
    Nothing has gone overboard yet, but I see tensions brewing.
    We would like to keep this forum neutral and scientific.
    If you make a claim, please avoid opinions and supply data to back up your statements.
    We are all relying on the expertise of each other to advance the discourse.
  19. Downvote
    Matt Katz got a reaction from fuzzbug in Correcting Porcelain Recipe   
    30% clay is not enough. It should be more in the range of 50%.
  20. Downvote
    Matt Katz got a reaction from Horace Dipthong in Vitrified Stoneware Strength: Cone 10 Vs.cone 6   
    Good question,
    That really depends on the clays themselves. Many Cone 6 clays are not fully vitrified anyway. So you want to ask for their absorption and density numbers. a full vitrified body will have a density of between 2.35 and 2.45 (g/cm^3) and an absorption of >0.5%, independent of temperature
  21. Like
    Matt Katz reacted to Matt Katz in Underglaze Under Clear Glaze   
    yes, i did. but are there not many reasons for why pinholing may occur?
     
     
    there are a few, but gas escape is only possible in once fire, never in bisque ware.
  22. Like
    Matt Katz got a reaction from Kath K in Underglaze Under Clear Glaze   
    We have done extensive study on that here at Alfred and that is a common myth. Because of the high viscosity of glass and the low pressure of gases, this is impossible. Pinholes are caused by poor packing of the glaze particles. If you want the background, you can check out Dave Finkelnburg's NCECA talk from 2007.
  23. Like
    Matt Katz got a reaction from dthorpe in Crimes And Mythdemeanors   
    Hi All,
    I wanted to welcome everyone to the Ceramic Arts Daily Forum.
    My name is Matt Katz and I will be the moderator around here.
    If anyone has any questions or concerns around here, please PM me.
     
    I wanted to start my first topic with an open forum to discuss common myths that plague the ceramics world.
    There is a litany of these things and I will add to them as we go. Please feel free to add your own or ask a question about something you have heard but are unfamiliar with. No question is too rudimentary, in fact I'm going to start with one that most of you may know, but some may not.
     
    Air Bubbles in Clay DOES NOT cause work to explode.
    Explosions in ware are always caused by Water/Moisture that remains in the clay.
    As a kiln heats and work warms, any remaining water in the body is quickly converted to steam. The steam rushes to escape the ware. If the release of steam is faster then the steam can leave the body, pressure builds and then the clay pops like an over inflated balloon.
     
    So dry your work thoroughly! To that end, avoid Hotboxs to dry. Hotboxes can cause similar failures and aid in cracking.
    A fan will do a much better job...but that is a topic for another day.
  24. Like
    Matt Katz got a reaction from dthorpe in Leaching & Unsafe Glaze Surface   
    There is no corelation between Matte glazes and food saftey. A properly formed Matte Glaze is a gloss glaze that crystals form in upon cooling. This is a result of composition and an abundance of Alumina and Calcium (or other Alkaline Earths) in your glaze matrix. Because of this, a properly composed matte is food safe.
    Improperly formulated mattes are under fired and can be non-food safe
  25. Like
    Matt Katz reacted to Linnet in Leaching & Unsafe Glaze Surface   
    I was once told that if a glaze that should fire to a gloss finish has any amount of matt finish then it would not be suitable for food due to leaching? I would think this would also depend on the glaze ingredients. Can anyone add to this please
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