Raku is a low-firing process originally inspired by traditional Japanese techniques, particularly those associated with the Japanese tea ceremony and Buddhist philosophy. Western-style raku typically involves removing pottery from the kiln at bright red heat and placing it into containers filled with combustible materials. As these materials ignite, the containers are sealed, creating an intense reduction atmosphere that alters the colors of glazes and clay bodies.

The rapid cooling and drastic thermal shock inherent to the process often result in crackling—deliberate cracks that add texture and visual interest to the piece. While the original Japanese raku was shaped by spiritual and cultural influences, the Western adaptation focuses on the dramatic effects produced by this high-risk, low-firing technique.

Firing Limits & Sizes

Each participant may bring up to 8 pieces for Raku firing.

The workshop includes up to 2,000 cubic inches of bisque firing. Individual pieces must not exceed 11 inches in height and 8 inches in diameter.

Please note: Raku-fired work is not food-safe.

Bisque Firing, Measurement & Additional Space

The 2,000 cubic inch limit applies to the included bisque firing only.

All work must be bone dry and dropped off no later than the Sunday prior to your scheduled firing. Late work cannot be guaranteed inclusion.

If your bisque exceeds the 2,000 cubic inch allowance, additional space may be purchased at:

• $0.10 per cubic inch, or

• $50 for an additional 1,500 cubic inches

Measurement tickets will be provided to help you calculate the cubic inches of your work. Tickets must be completed at the time of bisque drop-off or upon arrival for glazing.

Glazes & Surface Techniques

Participants will have access to 12 in-house specialty Raku glazes.

You may also experiment with:

• Naked Raku slip

• Horsehair applications

Firing Process

The workshop includes 4–5 firings using two Laguna Raku kilns and post-reduction chambers located in the parking lot.

You are welcome to bring your own combustibles to explore different atmospheric effects.

Schedule & Preparation

All pieces must be fully glazed and placed on the designated shelving by Saturday evening for Sunday firing.

Glazes must be completely dry before entering the kiln. Staff will be available throughout the process to assist and guide you.

Equipment & Hospitality

Food, beverages, and full staff support will be provided.

We supply sanitized safety goggles, flame-resistant gloves, aprons, and tongs. You are welcome to bring your own protective gear if preferred.

Due to high demand and the preparation time required for participants’ work, we kindly ask that cancellations be made at least two weeks prior to your scheduled Raku firing to receive a full refund.

Cancellations made within two weeks of the firing are eligible for a 50% refund.

Unfortunately, we cannot offer refunds for cancellations made within one week of the firing. Please note that we also do not transfer or hold credits.

Thank you for your understanding and cooperation.

1. How often do you hold Raku firings?
   We hold Raku firings once a month.

2. Can you bisque my pieces before the Raku firing? If so, how much does it cost?
   Yes! We’re happy to bisque your pieces at no additional charge. Just bring your greenware by Tuesday of the week of your scheduled Raku firing. Your bisqued pieces will be ready by Friday afternoon, and you can glaze them on either Friday or Saturday before the Sunday firing.

3. Do you offer private Raku firings?
   Yes! Private Raku sessions are available for $700 for 5 hours. Additional hours are $200/hour.
   For more information or to book a private Raku firing, email us at hello@gbclayhouse.com.

4. What kind of clay can I use for Raku?
   Any clay body rated above cone 5 will work. We recommend using a clay that contains sand or grog to better withstand thermal shock.

5. Do my pieces need to be bisqued ahead of time?
   Yes, all pieces must be bisqued before the Raku firing. Greenware cannot be fired in a Raku kiln.

6. When can I come in to glaze my pieces?
   We send an email to all participants on the Monday before their scheduled firing with details on glazing days—usually Friday or Saturday before the Sunday firing. If you can’t make it on those days, reach out to us and we’ll do our best to accommodate another day.

7. Do you provide horsehair or slip for naked Raku?
   Yes, we provide both.

8. Can I bring my own combustibles?
   Absolutely! Just check in with our team so we can confirm they’re safe to use.

9. Can I use my own Raku glaze?
   Yes! Just make sure your glaze is fully dry—apply it at least 24 hours before the firing. We recommend bringing your glaze to the studio on glazing days so you can apply it here and have it ready for the Sunday firing.

10. Are Raku firings open to the public?
    Yes! We love welcoming new friends to join us.

11. I’m signed up for a Raku firing; can I bring a friend?
    Yes, your friend is welcome to attend as a spectator. However, we can only fire work that is registered for the session.