Saggar firing

Saggars have long been used in wood-fired kilns. In these kilns you have flying ash. To protect the glaze from the ashes, the work is placed in a ceramic pot (saggar).

Saggars can also be used as an alternative firing method. Bisque fired work (unglazed) is placed in the saggar together with coloring and combustible materials. During the firing, the materials ignite and colors appear on the work.

You can read all about saggar firing in my book:
"Saggar firing in an electric kiln."

Masterclass 'Saggar firing in an electric kiln'

Masterclasses in Tilburg

In November I will give two master classes: on Friday 17 and Saturday 18 November. The masterclasses will be in Dutch.
If you're interested in an English masterclass in Tilburg, please let me know.
Location: Goretti, Wilhelmina Park, Tilburg.
Time: from 11 a.m. to about 4 p.m.
Price: € 110,- including lunch.

Want to organize a masterclass?

If you live outside The Netherlands and are interested in organizing a masterclass 'saggar firing in an electric kiln'  please contact me.

If you want to give saggar firing in an electric kiln a try, you can download here the instructions for making a saggar.

Making A Saggar
PDF – 7,1 MB 932 downloads

The masterclass is for people who have been working with clay for a while and have access to a kiln.

Short content of the masterclass:

  • What is a saggar
  • A saggar in an electric kiln
  • What kind of clay can you use
  • how to prepare your pieces for the saggar
  • Terra sigillata and recipe
  • Firing materials
  • Colorants
  • How to fill the saggar
  • Glazing

Frequently Asked Questions about saggar firing

Will my kiln turn black inside?

No, if it does, there was something wrong: there were too many combustible materials in your saggar or there was oil, paint or other contaminants on or in the materials you were firing with.

Does the fire alarm go off when I burn the saggar?

No, it will not.
When firing a saggar in an electric kiln many people have the image of a pitfire: a lot of smoke development. However, that is not true. Because you are burning in a relatively small space (the saggar), you only need very little combustible materials. You also need to make sure that everything is dry. If smoke does come out of your kiln then there were too many combustible materials in your saggar or your saggar was too big or there was oil or paint on your combustibles.

Will it affect my elements?

Hardly, if you do it right. Your elements get a bit 'affected' with every firing (bisque, glaze) so you have to replace them every now and then. My experience is that firing a saggar does not significantly shorten the life of the elements .

Can you do this also in a gas kiln?

You can also use the technique I describe in the book in a gas oven, but you must ensure that sufficient oxygen continues to 'flow' through the kiln.

Can the kiln be inside?

Yes, my kiln is also inside. Make sure you can ventilate the room well and do not work in the room when the oven is on (but that also applies to a biscuit or glaze firing).