Mid-fire glaze workshop

Mid-fire glaze workshop

Ceramic glaze formulation is one of the most complex areas of ceramics. To start with, one must choose a recipe. There are lots of sources with great photos, books and the internet, making the selection difficult. And after testing the recipe… the result is totally different ☹ Faced with this scenario, the question arises: what to do?

The starting point is one or more existing recipes found, for example, in books. These recipes are tested. May be adjusted and retested, till the expected result is reached. As for the adjustments, they rely on the analysis and prediction of results provided by an understanding of the role of oxides and by tools such as the unity formula and ratios.

There is no single method for learning how to make glazes. The method I propose is suitable for seeking specific colour and/or surface type solutions. How to achieve that specific shade of purple? How to achieve that level of transparency? How to identify and solve problems?


What is ceramic glaze and what are its main components. § Recipe and base recipe. How to develop a recipe. Testing, adjusting and recreating recipes.

Raw materials and oxides. § Oxide analysis using Glazy.org or Digital Fire Insight-live. §The Unity Molecular Formula (UMF) and the ratios used in decision-making. §Cases analysis and solving glaze defects like crazing and pinholing.

Results consistency. Measuring and recording glaze development. § Testing glazes.


People with some ceramics experience who wish to start developing their own glazes

Number of participants

1 or 2 participants


12 hours across three consecutive Saturdays (other schedules upon request).


- 1st and 2nd Saturday: 10am–1pm
- 3rd Saturday: 10am–12:30pm and 2:30pm–5pm

Picking up the test tiles and feedback on a mutually agreed-upon date (1 hour).

Dates (2024)

- 16, 23 and 30 March
- 13, 20 and 27 April
- Other dates upon request.



What is included

Glaze materials and firing costs.

What to bring

Tablet, apron, mask (KN95) and 10 test tiles.


Casével, Santarém, Portugal

Terms and conditions

Cancellations made 7 days or more in advance of the start date of the workshop are entitled to 100% refund. Cancellations made less than 7 days before the start date of the workshop are entitled to a 70% refund.

Should the applicant withdraw or be absent from a class after the start of the. training session, no amount will be refunded.

About the teacher

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