Name: Food Safe and Stable Glazes
Price: 130 GBP
Availability: InStock

<h2 id="isPasted" fr-original-style="" style="box-sizing: border-box;">What is the course about?</h2>
<p fr-original-style="" style="color: var(--text); font-size: var(--font-size); box-sizing: border-box;">If you mix up your own glazes, whether just picking recipes from books and web sites or running your own R&amp;D program, this course will help you by showing you what makes glazes leach, or not be food safe, or craze, and what you can do about it.</p>
<p fr-original-style="" style="color: var(--text); font-size: var(--font-size); box-sizing: border-box;">Much of the content of this course was in the previous version of the Product Safety course, but I have now taken it out into a separate course as many on the Product Safety course do not mix their own glazes. This also allows me to go into the glaze chemistry in a bit more depth.&nbsp;</p>
<p fr-original-style="" style="color: var(--text); font-size: var(--font-size); box-sizing: border-box;">Six weekly sessions, 19:00 &ndash; 20:30<br fr-original-style="" style="box-sizing: border-box;">Also recorded and put onto the course web page so you can view them at other times</p>
<p fr-original-style="" style="color: var(--text); font-size: var(--font-size); box-sizing: border-box;">The course begins with a quick recap of glaze chemistry and structure. It then looks at how glazes can be attacked in acidic (food) and alkaline (dishwasher) environments, and how you can make your glazes more stable. This includes using tools like Stull and limit formulae, as well as testing glazes in the studio and in the laboratory.&nbsp;</p>
<p fr-original-style="" style="color: var(--text); font-size: var(--font-size); box-sizing: border-box;">To consider the food safety of glazes, we look at which components may be toxic and at what levels, and combine this with our work on glaze stability. We also look at food safety legislation .</p>
<p fr-original-style="" style="color: var(--text); font-size: var(--font-size); box-sizing: border-box;">We also consider crazing, to determine in which circumstances it may or may not be acceptable, what causes it, and methods by which you can avoid it.</p>
<h2 fr-original-style="" style="box-sizing: border-box;">What will I achieve?</h2>
<p fr-original-style="" style="color: var(--text); font-size: var(--font-size); box-sizing: border-box;">By the end of this course you should be able to:</p>
<ul fr-original-style="" style="box-sizing: border-box;"><li fr-original-style="" style="box-sizing: border-box;">Understand what is meant by glaze stability</li>
<li fr-original-style="" style="box-sizing: border-box;">Know how to use like the UMF, limit formulae, Stull chart and other guidelines to assess potential problems</li>
<li fr-original-style="" style="box-sizing: border-box;">Understand the mechanisms of glaze leaching in both alkaline (dishwasher) and acidic (food) environments</li>
<li fr-original-style="" style="box-sizing: border-box;">Understand which materials in glazes are potentially toxic, and how likely it is that a glaze will be toxic</li>
<li fr-original-style="" style="box-sizing: border-box;">Know how to test glazes in the studio, and sending glazes to a laboratory for testing</li>
<li fr-original-style="" style="box-sizing: border-box;">Take a glaze formula and improve its stability</li>
<li fr-original-style="" style="box-sizing: border-box;">Understand the causes of crazing</li>
<li fr-original-style="" style="box-sizing: border-box;">Take a glaze formula and increase or decrease its tendency to craze</li>
<li fr-original-style="" style="box-sizing: border-box;">Understand the legislation and standards covering food safety and testing (UK, EU and USA)</li></ul>
<h2 fr-original-style="" style="box-sizing: border-box;">What level is the course and do I need any particular skills?</h2>
<p fr-original-style="" style="color: var(--text); font-size: var(--font-size); box-sizing: border-box;">Intermediate to advanced. Some basic knowledge of glaze chemistry and glaze formulation is required.</p>
<h2 fr-original-style="" style="box-sizing: border-box;">How will I be taught, and will there be any work outside the class?</h2>
<p fr-original-style="" style="color: var(--text); font-size: var(--font-size); box-sizing: border-box;">The course is primarily run through the weekly online sessions, which are a live lecture where you can also ask questions or get a discussion going. These are recorded and put on the course web page for those who cannot make the course times due to time zones or other commitments, or for those who want to replay them.</p>
<p fr-original-style="" style="color: var(--text); font-size: var(--font-size); box-sizing: border-box;">Additional material that you may wish to explore is on the course website. This will help you go deeper into the subject matter, should you wish to do so.</p>
<p fr-original-style="" style="color: var(--text); font-size: var(--font-size); box-sizing: border-box;">There will also be a discussion period towards the end of the course, where we can discuss any of the course material or any more general questions you may have. The date and time will be set up at the start of the course, so as many people as possible can participate even if unable to attend the live sessions.</p>
<p fr-original-style="" style="color: var(--text); font-size: var(--font-size); box-sizing: border-box;">In addition, the course has an online forum that you can use at any time.</p>
<p fr-original-style="" style="color: var(--text); font-size: var(--font-size); box-sizing: border-box;">There will be suggestions for you to test some of your pieces and glazes between sessions.</p>
<h2 fr-original-style="" style="box-sizing: border-box;">Are there any other costs? Is there anything I need to bring?</h2>
<p fr-original-style="" style="color: var(--text); font-size: var(--font-size); box-sizing: border-box;">No advance preparation is needed.</p>
<p fr-original-style="" style="color: var(--text); font-size: var(--font-size); box-sizing: border-box;">You may want to test some of your work or test tiles (which will probably get damaged in the process).&nbsp;<br fr-original-style="" style="box-sizing: border-box;">This mostly uses standard studio and kitchen equipment, though the following are useful if available:</p>
<ul fr-original-style="" style="box-sizing: border-box;"><li fr-original-style="" style="box-sizing: border-box;">A pressure cooker</li>
<li fr-original-style="" style="box-sizing: border-box;">Methylene blue or a similar dark stain (5ml is plenty)</li>
<li fr-original-style="" style="box-sizing: border-box;">pH paper or a pH meter</li>
<li fr-original-style="" style="box-sizing: border-box;">50g of soda ash</li>
<li fr-original-style="" style="box-sizing: border-box;">Vinegar or acetic acid</li>
<li fr-original-style="" style="box-sizing: border-box;">Lemon juice or citric acid</li></ul>
<p fr-original-style="" style="color: var(--text); font-size: var(--font-size); box-sizing: border-box;">You may also want to have some glaze recipes that you can examine during the course.</p>
<h2 fr-original-style="" style="box-sizing: border-box;">What do I get?</h2>
<ul fr-original-style="" style="box-sizing: border-box;"><li fr-original-style="" style="box-sizing: border-box;">Four live lectures with questions and discussions, lasting about 90 minutes each week</li>
<li fr-original-style="" style="box-sizing: border-box;">Recordings of all lectures for later viewing</li>
<li fr-original-style="" style="box-sizing: border-box;">Additional optional online course material, giving background info and greater depth</li>
<li fr-original-style="" style="box-sizing: border-box;">A discussion period, set up at a date/time for most students to attend even if not able to attend the live sessions</li>
<li fr-original-style="" style="box-sizing: border-box;">Dedicated online forum for discussion by all students on the course</li>
<li fr-original-style="" style="box-sizing: border-box;">Downloadable PDFs of all presentations</li>
<li fr-original-style="" style="box-sizing: border-box;">Premium level access to the Tech part of my web site, containing much more information, references etc.</li>
<li fr-original-style="" style="box-sizing: border-box;">Course completion certificate</li></ul>

What is the course about?
If you mix up your own glazes, whether just picking recipes from books and web sites or running your own R&D program, this course will help you by showing you what makes glazes leach, or not be food safe, or craze, and what you can do about it.
Much of the content of this course was in the previous version of the Product Safety course, but I have now taken it out into a separate course as many on the Product Safety course do not mix their own glazes. This also allows me to go into the glaze chemistry in a bit more depth. 
Six weekly sessions, 19:00 – 20:30
Also recorded and put onto the course web page so you can view them at other times
The course begins with a quick recap of glaze chemistry and structure. It then looks at how glazes can be attacked in acidic (food) and alkaline (dishwasher) environments, and how you can make your glazes more stable. This includes using tools like Stull and limit formulae, as well as testing glazes in the studio and in the laboratory. 
To consider the food safety of glazes, we look at which components may be toxic and at what levels, and combine this with our work on glaze stability. We also look at food safety legislation .
We also consider crazing, to determine in which circumstances it may or may not be acceptable, what causes it, and methods by which you can avoid it.
What will I achieve?
By the end of this course you should be able to:
Understand what is meant by glaze stability
Know how to use like the UMF, limit formulae, Stull chart and other guidelines to assess potential problems
Understand the mechanisms of glaze leaching in both alkaline (dishwasher) and acidic (food) environments
Understand which materials in glazes are potentially toxic, and how likely it is that a glaze will be toxic
Know how to test glazes in the studio, and sending glazes to a laboratory for testing
Take a glaze formula and improve its stability
Understand the causes of crazing
Take a glaze formula and increase or decrease its tendency to craze
Understand the legislation and standards covering food safety and testing (UK, EU and USA)
What level is the course and do I need any particular skills?
Intermediate to advanced. Some basic knowledge of glaze chemistry and glaze formulation is required.
How will I be taught, and will there be any work outside the class?
The course is primarily run through the weekly online sessions, which are a live lecture where you can also ask questions or get a discussion going. These are recorded and put on the course web page for those who cannot make the course times due to time zones or other commitments, or for those who want to replay them.
Additional material that you may wish to explore is on the course website. This will help you go deeper into the subject matter, should you wish to do so.
There will also be a discussion period towards the end of the course, where we can discuss any of the course material or any more general questions you may have. The date and time will be set up at the start of the course, so as many people as possible can participate even if unable to attend the live sessions.
In addition, the course has an online forum that you can use at any time.
There will be suggestions for you to test some of your pieces and glazes between sessions.
Are there any other costs? Is there anything I need to bring?
No advance preparation is needed.
You may want to test some of your work or test tiles (which will probably get damaged in the process). 
This mostly uses standard studio and kitchen equipment, though the following are useful if available:
A pressure cooker
Methylene blue or a similar dark stain (5ml is plenty)
pH paper or a pH meter
50g of soda ash
Vinegar or acetic acid
Lemon juice or citric acid
You may also want to have some glaze recipes that you can examine during the course.
What do I get?
Four live lectures with questions and discussions, lasting about 90 minutes each week
Recordings of all lectures for later viewing
Additional optional online course material, giving background info and greater depth
A discussion period, set up at a date/time for most students to attend even if not able to attend the live sessions
Dedicated online forum for discussion by all students on the course
Downloadable PDFs of all presentations
Premium level access to the Tech part of my web site, containing much more information, references etc.
Course completion certificate

Tim Thornton

Ceramics

Food Safety

Pottery

Arts & Crafts

Product Design

Product Making

If you mix up your own glazes for your pottery, this course will teach you all about food safety and glaze stability, and understand the underlying chemistry.

Food Safe and Stable Glazes

General Admission

potter

electrickiln

kiln

tableware

Lampshade Making

Health & Safety

health and safety

Health & Safety At Work

COSHH (Control of Substances Hazardous to Health)

Health & Safety Awareness

Clay

ovenware

pottery studio

product safety

lamp

glaze

Lighting

electric lamp

table lamp

silicosis

lampmaking

Lighting Design

pottery studio warrington

Stained Glass

raku pottery

potteryworks

pottery wheel

raku workshop

pottery classes Northwest 

Fine Art

Children's Art

Acrylic Painting

Sketching

art  

festive making

Wire Sculpture

Art Teacher

Kiln Formed Or Fused Glass

Harvest

pottery experience

pumpkins

Wellbeing

pottery weekend

pottery classes Altrincham 

Meditation

potteryfairyhouse

pottery studio northwich 

ceramics course

mothers day workshop

pottery course

pottery class 

For Kids

Rural Crafts

Art Therapy

Art History & Theory

Glass Jewellery

pottery class St Helens

Impressions

Floristry

Watercolour Painting

ceramics classes

Copper Jewellery

Flower Arrangement

Paper Craft

Creativity

ceramics studio

Clay Sculpture

pottery classes Cheshire 

fairyhouse

Art Conservation

Book Crafts

pottery painting 

Creative Therapy

Christmas

Earring, Pendant & Chain Necklace

Needle Felting

Book Illustration

pottery classes Knutsford

art workshop

pottery studio cheshire 

Painting Skills & Techniques

Paper Cutting

art class

festive workshops

handbuilding with clay

festive workshop 

Landscape Art

Garden Decoration

Christmas Wreath Making

festive workshop

Printmaking & Design

Glazing

potterypumpkin

Handmade

christmas decorations 

Glass Fusion

mothers day experience 

Wreath Making

christmas workshop

Oil Painting

ceramics class

Potters Wheel

pottery studio knutsford

fairy

Coppersmithing

classes

Contemporary Art

ceramics workshop 

mindful making

pottery manchester

pottery classes Manchester 

kiln firing

Bookbinding

Children's Book Illustration

pottery studio northwest 

Greeting Cards

Emotional Wellbeing

Phoenix Pottery and Art Studio

Felt-Making

Kids

.NET MAUI

sewing machine maintenance 

re-fashion

papermaking

zips

Stitch

coverstitch

Hand Embroidery

pants

Toy Making

serger

Christmas Wreath

Macrame

up-cycling

free workshop

sewing

lacemaking

no glue

Interior Decoration

knickers

sewing masterclass

wet felt

yarn craft

Block Printing

teen

Patchwork

Weaving

halloween

Pattern Making

Wool Painting

fairisle

rag rug

Mixed Media

Felting

Cyanotype & Sun Printing

Fabric

Fashion

stretch fabrics

sewing stretch 

kids craft

Sewing

Christmas Crafts

swimwear

Quilting & Patchwork

Long Arm Quilting

Quilt Finishing.   

Scarf & Glove Making

pattern cutting

Clothes Making

t-shirt

Tunisian Crochet

book binding

Indigo Dyeing & Shibori

Bag Making

jacket

homewares

Felted Pictures

Cushions Making

Wool Sculpture

Tote Bag

Fashion Crafts

Nuno Felting

holiday club

childrens craft

textile art

tote bag 

Dorset Buttons

papercraft

fabric printing

Stitching Kitchen

1 Vases, Bowls & Jugs courses delivered Online

Food Safe and Stable Glazes

By Tim Thornton

Educators matching "Vases, Bowls & Jugs"

tim thornton

Hereford

phoenix pottery and art studio

Warrington

stitching kitchen

Brackley

bristol folk house

Bristol