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How to mix plaster

Viscosity and Glaze

30/1/2016

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Viscosity is an issue in my glazing.  My clear glaze needs a thin application to look its best.  Too thick and I have pin holing and crawling in the commercial glaze I was using.  I have been glazing pots for close on 40 years So i decided to get some help from a hygrometer as above.  It is a glass tube with lead shot in the bottom that makes it float  upright.  On the side it has calibration.  It did not help me.  I read about it on an American website.  I bought the thing on an English website  What I didn't know was the scale on the hygrometer is different between each country.  I tried to convert one to the other.  No way with my maths.  I should be able to still use it I thought.  Two problems  It seemed to sit in the same place no matter how much water was in the glaze and because the glaze was thin it left no mark on the glass of where it got up to.  I tried to read it in the bucket.  It was too hard.  I needed something less high tech
So here we are.  I had to buy a stopwatch.  I bought this one on eBay for $70 second hand  It has a Swiss movement so I hope it is reliable.  On eBay they range from $5 to $400. 

​Now follow the captions on the photos by clicking on them.  Use the arrows to move from one to the other.

​The viscosity cup is a lot easier to use.  I don't have to stress about breaking it.  I don't have to go cross eyed doing the math etc etc
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    ​Sophi



    Sophi lives in Canberra. Her workshop is in the middle of her garden.  Sophi is living her dream of potting whenever she wants to.  Her work has environmental and identity themes  Sophi works with slip cast pieces combined to present ironic images  Sophi likes simple so uses simple materials

    Sophi's work is in two modes;  the art context and the utilitarian context.  She is ably assisted by her potters assistant, carer and daughter Nicolette

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M-F: 12 noon  - 3 pm

TelephoNE

0421900077

Email

sophi.suttor@gmail.com
  • Gallery
  • Start in pottery
    • Glazing? Improve your technique
  • Technical Information
  • HOW TO MIX PLASTER
  • Recent Milestones
  • about
  • Contact
  • More Ceramics
  • Link Page