Linda Bloomfield – Glaze Material & Making Workshop: 9th & 10th August 2025

This workshop is the sought after two day glaze workshop by Linda Bloomfield. There are two elements of this workshop: (i) glaze materials lecture and (ii) practical glaze making and discussion. On day 1, Linda will demonstrate glaze making, after which you will be mixing your chosen glazes and then glazing your test tiles. At the end of day 1, your test tiles will be fired. On day 2, we will start with a talk on glaze materials. The kiln will be opened during lunch and we will be discussing the results in the afternoon.

Please note that this is a learning workshop and London Potters cannot guarantee results from this workshop.

There is a limit of 12 attendees only so early booking is essential.

Please read carefully the materials you will need to bring for this workshop.

*Tickets will be available for non members after a period of exclusivity for London Potters members.

IMPORTANT

MATERIALS YOU NEED TO BRING

You will need to bring the following:

1. Maximum of 20 test tiles:
   1. Vertical tiles only with maximum height of 6cm – we cannot fit taller ones into the kiln. Horizontal flat or other forms will not be fired if we run out of space.
   2. Please mark your test tiles with your maker’s mark and number them e.g. by impressing these into the clay
   3. A suggestion to make test tiles that has a ridge to test the flow of the clay and for pooling of glaze
   4. Use clay that you normally use.
   5. Clay should be able to be fired to 1240C.
   6. Test tiles should be bisqued at low fired temperatures.
   7. Test tiles must stand with stability and not wobbly – if tiles are not stable, they may fall and stick to other people’s tiles during firing. Wobbly tiles will not be fired to protect other attendees’ work.
2. Dust mask
3. Digital scales:
   1. Accuracy to .01 or triple beam
   2. Additional scale that can measure up to 300g of material
4. Standard 80 mesh sieve. Two sizes:
   1. Test sieve should be slightly smaller diameter than the container so that it fits on top
   2. Larger sieve for the base glaze
5. Two bowl which should be large enough to hold up to 700ml of liquid (for the base glaze)
6. A jug
7. A syringe that can hold 100ml liquid
8. 15 x covered plastic tubs if you wish to take test glazes home
9. 15 x small plastic containers (e.g. plastic cup) which your test tiles can be dipped into
10. 15 x Plastic spoons
11. Rubber spatula
12. Brushes (a thin one for marking your name onto tiles) or underglaze pencil
13. Sponge for cleaning tiles
14. Towel
15. Apron
16. Notebook
17. Pen/pencil to take notes
18. Sharpie or marker to mark your containers
19. Plastic Gloves (optional)
20. Lunch and drinks

LONDON POTTERS WILL PROVIDE THE FOLLOWING RAW MATERIALS

• Soda feldspar
• Potash feldspar
• China clay
• Whiting
• Quartz
• Talc or dolomite
• Zinc oxide
• Borax frit
• Nepheline syenite
• Barium or strontium carbonate
• Bone ash
• Lithium carbonate
• Tin oxide
• Titanium dioxide
• Zirconium silicate
• Cobalt
• Copper
• Chromium
• Iron
• Manganese
• Nickel

This class is for beginners and recipes will be provided. However, if you know that you wish to make glazes from a recipe that require materials not listed above, please ensure you bring them to the workshop. Some materials may also be available to purchase from Cernamic Studio however minimum quantities may apply.

Photo taken by Janet White at the 2023 event