Learn about solventless hash production from Bubbleman. Live wash, freeze drying, rosin pressing, and full melt techniques. Limited seats.About this Event
Hash Masters University Feat. The Real Cannabis Chris
Whether you're just starting out or have years of experience under your belt, our classes offer invaluable insights, techniques, and expertise from the best solventless hash makers in the world.
This month’s class is hosted by the Bubbleman
Marcus Richardson, better known as The Bubbleman, is one of the most influential figures in modern hash making. A cannabis pioneer since the early 1990s, he is best known as the inventor of Bubble Bags—one of the first widely adopted systems for ice water extraction, helping popularize solventless hash production worldwide.
Beyond his products, Marcus has spent decades educating the global cannabis community. He is the founder of Hash Church, a long-running weekly series that has become a hub for hashmakers to share knowledge, stories, and techniques.
Tickets:
Our last educational event sold out in under 24 hours, and this time, with only 20 tickets available, they're sure to disappear quickly.
Your Ticket Purchase Includes:
- Access to the one day class
- WhatsApp number to contact Bubbleman directly anytime with questions
- Currated gift bag from Lowtemp
- A catered lunch
What to Expect
- A deep dive into the history of ice water extraction
- How to recognize and select full melt wash genetics for the highest quality results.
- Learn the fundamentals of preparation, washing, and collection techniques.
- A live, full wash of material in the Mini Osprey 2.0, walked through step by step.
- Enjoy a delicious lunch break to refuel and network with fellow attendees.
- An in-depth breakdown of the best freeze dryer settings for different applications, including a full explanation of sublimation.
- Considerations for lab space and environmental controls.
- Live rosin pressing with Bubbleman's personal tips, tricks, and techniques.
- A comprehensive Q&A session to address your questions directly with Bubbleman.
- Raffle to win a SECRET & BRAND NEW Lowtemp Industries Product
Loose Agenda:
Morning Session
Kick off the day with introductions and a high-level look at solventless extraction, including the foundations of ice water hash, selecting the right starting material, and a live wash demonstration with real-time insights and technique.
Lunch + Networking
Take a break with a catered lunch and connect with fellow attendees, the Lowtemp team, and Marcus.
Afternoon Session
Dive into post-processing and refinement, including freeze drying fundamentals, lab considerations, and live rosin pressing. Wrap up with quality tips, open Q&A, and a raffle for a secret new Lowtemp product, followed by a relaxed hangout to close out the day.
Event Venue
Denver, United States
USD 1099.91











