Including UK VAT*

This Masterclass is a companion course to the 'Open-Face' Wax Casting Masterclass starting on November the 6th. It is not essential that you have done the previous course, however, the techniques taught will develop upon the skills developed in Part A, and as such, it is advised. 

What You Will Learn

When an object is transformed into a wax state, you can alter its structure, duplicate its form, and conjoin it with contrasting elements to create unique assemblages.

Taking advantage of ‘multi-part’ and ‘flask’ mother moulds for creating detailed multiples in wax, we will re-appropriate readily identifiable objects into one-of-a-kind configurations in Bullseye glass that prompt the viewer to think and ask questions. A variety of applications for shaping and casting waxes will be introduced, along with an in-depth overview of the lost wax process for kiln-casting.

You will learn hand-built refractory mould construction and coldworking techniques to contour polish and flatten the bases of your cast glass sculptures.

Some glass-working experience is helpful but not required. Advanced students are also welcome.

See more of Joanna's work here:

Joanna Manousis Enclosed Wax Casting with Multi-Part Moulds Materials List.pdf


Duration: 3 weeks, one session per week - a total of 4.5 hours

Online Course

Please note that classes may be slightly longer or shorter depending on student questions.

Session times

  • Monday 27th November 2023 - 7 pm-8.30 pm UK time (1.5 hours)
  • Monday 4th December 2023 - 7 pm-8.30 pm UK time (1.5 hours)
  • Monday 11th December 2023 - 7 pm-8.30 pm UK time (1.5 hours)

Please note that classes may be slightly longer or shorter depending on student questions.

Class Description

Learn a comprehensive method for glass casting into Enclosed Wax Casting for Multi-Part Moulds, from beginning to end. In this course, Joanna will cover:

  • Two-part rubber/plaster mother moulds
  • ‘Flask’ / ‘open-face’ mother moulds
  • Wax pouring/assemblage
  • Sprues and vents
  • Hand-built refractory mould making
  • Steaming
  • Glass-weight calculation
  • Kiln set-up
  • Firing
  • Divestment
  • Cold-working

Workshop Outcome:

  • 2-part / flask rubber mother-moulds
  • 1-2 cast glass sculptures

How it Works: 

  • The course is made up of three live and interactive online sessions using the Zoom platform. You will find the zoom link via the week chapters in the navigation panel. 
  • Joanna will give a step-by-step tutorial with demonstrations, and you will have ample opportunity to ask her questions during the live class
  • Each week they will demonstrate a technique for you to try between sessions
  • A member of the Glass School team will also be in the Zoom class to assist you and Joanna
  • Mix with Joanna and other students on our dedicated community page, open for the duration of the course. Then join our exclusive Glass School UK Online Glass Community Facebook group to continue to mix with those who have attended any of our online masterclasses
  • A materials list is provided in the course navigation panel, so you can purchase what you need to create your pieces during the course. You don’t need absolutely everything on this list to be successful, Joanna will discuss different ways to reach our technical goals

We believe that this is the best way to get the very most from the course, but if this doesn’t suit you that’s fine: - If you can’t get to your studio, you can still learn the techniques and benefit from Joanna's extensive knowledge without making the pieces during the course itself.

This is a live online masterclass, but in case a student experiences issues with internet connection during the live class, a recording of each live session will be available to view until two weeks after the final session. This cannot be downloaded or shared and is only available for this limited time. By participating you agree to be recorded for this purpose.

These recordings will be available in the course navigation panel. 

What to Prepare

  • You will need a computer, tablet, or phone with a camera and microphone in order to join the online classroom. If you are unfamiliar with using Zoom then please take some time to look at our guide, available in the navigation panel. 
  • You should have a reliable internet connection, fast enough to make video calls or stream videos
  • Please read the Student Participation Agreement
  • Ensure that you have checked the materials list and purchased any materials you may require 
  • A pen and paper to take any notes. 
  • We restrict the class size to 25 people
  • We teach using Bullseye Glass (CoE90)


We are committed to maintaining a respectful community where all our students can learn and develop their full potential, within a safe environment.

If you have a disability or any specific requirements, please do not hesitate to contact us prior to your lesson so we can accommodate you.

*Price excluding VAT is £112.50. The correct tax will be calculated at checkout based on your location.

Cancellations up to 2 weeks before the course receive a 90% refund, after that date, a 50% refund will be given up to one week prior to the course, and no refund is given for cancellations after this time. In order to keep class costs low for all, we make no exceptions to this policy. In order to cancel your place on the course please contact [email protected] 

Course Curriculum

    1. Welcome

    2. Course Overview

    3. Student Participation Agreement

    4. Join the Community!

    5. How to Navigate the Community Page

    6. Materials List

    7. How to Download your Materials List!

    8. A Guide to Zoom and the Live Session

    9. All Set for the First Session!

    1. Basic Lost Wax Kiln Casting

    2. Bullseye Annealing Thick Slabs

    3. Course Handout - Reclaiming Clay

    1. Welcome to Week One

    2. Enclosed Wax Casting with Multi-Part Moulds Handout

    3. Zoom Link - Week One - Joanna Manousis - Monday 27th November 2023

    4. Week One - Recording

    1. Welcome to Week Two

    2. Firing Schedules

    3. Zoom Link - Week Two - Joanna Manousis - Monday 4th December 2023

    4. Week Two - Recording

    1. Welcome to Week Three

    2. Zoom Link - Week Three - Joanna Manousis - Monday 11th December 2023

    3. Week Three - Recording

    1. Submit Your Finished Works

Joanna Manousis

Joanna Manousis is a British–American artist working in glass and mixed media. Her work has been recognized with nominations for the Louis Comfort Tiffany Foundation Award and a Bombay Sapphire Award Nomination for 'Excellence in Glass' as well as the Margaret M. Mead Award and the Hans Godo Frabel Award. Manousis has received support from internationally recognized residency programs including the Glass Pavilion at the Toledo Museum of Art, Ohio; the Museum of Arts and Design, New York; the Corning Museum of Glass, New York; and Cité Internationale des Arts, Paris, France. Her work has been exhibited at Design Miami and Art Basel, Basel, Switzerland; FOG Art + Design, San Francisco; the Glasmuseet Ebeltoft, Ebeltoft, Denmark; and the British Glass Biennale, Stourbridge, England.

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