This is a live online class, taught over Zoom.

Learn to use alginate, an eco-friendly, affordable mould-making material, to create sculptural glass castings from life. Rebecca will demonstrate hand casting with the bucket method and face casting with the lay-up technique. You’ll create wax positives, refine them, and cast them into glass using a plaster-silica refractory mould.

Course price: £190.00

Learn to use alginate, a seaweed based, eco-friendly, skin-safe, economical mold making material, to create sculptural glass castings from life. Two styles of molds will be demonstrated: a bucket mold where the model is submerged (i.e., a hand), and a lay-up mold, where alginate is painted on and reinforced with plaster bandage (i.e., the face).

Alginate molds will then be used for creation of wax positives which can be manipulated if desired and ultimately cast into glass in a plaster-silica refractory mold. The course will cover the process from start to finish.
You can view more of Rebecca's work here: https://www.rebeccaarday.com/

Skill Level
• Beginners are welcome, some experience with casting is helpful.

Course Summary
Discussions will include:
• Alginate Moldmaking
• Waxworking
• Hand-built Refractory Moldmaking
• Steaming
• Calculation of Glass
• Glass Selection
• Kiln Anatomy & Set-up for Firing
• Firing Schedule Theory
• Divesting
• Coldworking

Workshop Outcomes:
• 2 styles of single-use alginate molds
• 2 cast glass sculptures

Session Times
• Tuesday 7th July 2026 - 5.30 pm - 7.00 pm UK time (This session might be a little longer)
• Tuesday 14th July 2026 - 5.30 pm - 7.00 pm UK time (This session might be a little longer)
• Tuesday 21st July 2026 - 5.30 pm - 7.00 pm UK time (1.5 hours)
• Tuesday 28th July 2026 - 5.30 pm - 7.00 pm UK time (1.5 hours)

How it Works
• The course is made up of live and interactive online sessions using the Zoom platform. You will find the zoom link via the week chapters in the navigation panel.
• The artist will give a step-by-step tutorial with demonstrations, and you will have ample opportunity to ask them 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
• Mix with the artist 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, the artist will discuss different ways to reach our technical goals.

All live online masterclass sessions are recorded, so if you cannot attend the live sessions or access your studio at certain times, you can watch the sessions back. These will be available for up to four weeks after the final session. Recordings cannot be downloaded or shared and by joining you agree to being recorded.

These recordings will be available in the course navigation panel.
• 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 30 people
• We teach using Bullseye Glass (CoE90)

Contact: Glass School
Email: info@glass-school.co.uk
Book your place