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Technical advances in cannabis curing focus on water activity and terpene stability

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Curing is one of those phases of cannabis production that almost everyone agrees is important, but that importance hardly translates into cannabis facilities. It’s understandable that growers want to maximize their canopy space first and foremost. After all, more flowers, more income. However, the irony is that by the time a plant reaches the curing room, most of the money has already been spent. The genetics are locked in, the lights have done their job, the rooms have been marked, the harvest has been carefully handled. And yet, quality is often validated or left behind.

Simon Knobel of Calyx Containers has spent an amazing amount of time thinking about this disintegration. The company started about 9 years ago, when Simon and his co-founder Alex were still in school and adult cannabis was becoming legal in Massachusetts. “Back then, cannabis packaging meant pill bottles, borrowed wholesale from the pharmaceutical world and reused without much thought,” explains Simon. “Our initial instinct wasn’t to do something revolutionary. It was just to build something that made sense for cannabis.”

As the company developed a range of packaging formats, the focus was on quality at the point of sale. “Scent retention, ease of use, shelf life, that was the pace of our design process. What took longer to fully register was that the degradation didn’t just happen after packaging. In many cases, it was already baked in during curing.”

Simon and Calyx did extensive market research to understand what was happening with quality degradation. “It’s good to talk not only with operators, but with consumers.” A story stuck. Simon recalls interviewing a client who was on a ski trip with his family and trying to hide the fact that he had cannabis with him. This awkwardness of smell, discretion and manipulation became a design problem. The sliding cover, integrated gasket, meant the elimination of the twisting motion that gave some users a literal pain in the wrist. But it also opened up a deeper line of research.

As Calyx began to talk more seriously with growers, a recurring question came up. Where exactly does quality start to slip? To answer this, the company partnered with the Cannabis Research Coalition and worked with Dr. Allison Justice on research based on the cure. “What we found was that it wasn’t particularly comfortable for anyone relying on legacy methods,” says Simon. “One of the biggest drivers of terpene preservation was the stability of water activity. When water activity drops below 0.55 aW, the stomata begin to collapse, then shrink, then break. At that point, the mono-terpenes escape.”

These mono-terpenes are responsible for most of the aromas associated with quality cannabis. “They are also volatile in nature. Once they’re gone, they’re gone,” highlighted Simon.

© Calyx Vessels

Basic methods and alternatives
Traditional healing methods are based on burping. Opening containers, exchanging air, manually regulating humidity. “This methodology works, but it also introduces oxygen. In addition, the plant material is also subject to mechanical stress. Both oxygen and mechanical stress accelerate degradation, thus hampering quality.”

Calyx Cure was designed as an alternative to that ritual. “Instead of active intervention, Calyx Cure uses a passive atmospheric film with selective permeation properties. The layers are designed to allow specific gases to move through the material while others are restricted. Biological curing processes continue, but without opening the container, without introducing excess oxygen and without handling the flower.”

In controlled studies, Calyx saw a 33% improvement in monoterpene profile preservation compared to traditional approaches such as turkey pouches. “Practically speaking, that first hit of aroma you get when you open a jar, driven largely by monoterpenes, is intact.”

Complicating the picture is that curing is not reversible. There is a persistent belief that if cannabis dries out too much, there are no moisture packs or other interventions that can bring it back. “Excessive drying slows down the enzymatic reactions, alters the aging process and permanently changes the composition of the terpenes. Once the quality is lost at that stage, the bottle cannot revive it,” he said.

© Calyx Vessels

Curing and speed to market
Therefore, post-harvest processes cannot be the last element of cannabis facility design. “Sometimes speed or short-term cost savings drive the decision. Cure less, move product faster and assume the container will handle the rest.” Market dynamics don’t help either. When a new market opens and the shelves are empty, speed is rewarded and cutting corners can be the difference between hitting dispensaries later.

Calyx approaches it as a manufacturing and engineering problem rather than a branding exercise. Unlike much of the packaging industry, which operates largely as a middleman, Calyx operates its own factory in Utah. “That vertical integration allows us to iterate quickly. New designs can be prototyped in 1 or 2 weeks.”

This can be a huge plus, as quality control is a hot topic in the wider world of agriculture, not just cannabis. The industry often talks about wanting nutraceutical or food standards. These industries have already solved the complexity of the supply chain. They know how to produce in one region and deliver consistently to another. Cannabis, especially if it wants to move globally, will need similar discipline.”

And as with food packaging, sustainability is part of that equation in cannabis. Calyx has extensively studied compostable and hemp-based structures. “Compostable materials struggle with terpene conservation and water activity control. If the package breathes too much, the plant pays the price.”

Instead, Calyx’s approach to sustainability is based on reducing the use of materials at the manufacturing level. “The cover molded joint is a good example,” explains Simon. “Traditional seals require cutting circular inserts from large sheets, creating huge waste. We’ve designed molds where a small amount of polymer forms the cover and joint in one plane, creating almost zero waste and a fully recyclable component.”

Healing, it seems, is not passive waiting. “It’s an active and fragile process,” says Simon. “And like most fragile things in cannabis, it benefits from being engineered rather than inherited.”

For more information:
Calyx vessels
1991 W Parkway Blvd. West Valley City, UT, 84119-2026
724-303-7481
(email protected)
calyxcontainers.com

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“UK medical cannabis is maturing”

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The UK cannabis market has grown steadily over the past five years, although not always in the way operators had hoped. New brands and imported products have driven much of the expansion, while domestic cultivation has slowed. Alexander Mountain has seen this from the inside long before most people in the industry knew it existed. “I’ve been waiting for this since 2009,” says the founder of growing consultancy Trichome Solutions.

Regulations, compliance, EU-GMP requirements, all of which have made getting a facility off the ground a multi-year exercise. “I’ve worked with organizations and seen firsthand that it takes three, four, even five years to get going,” says Alexander. “It’s a tough market to break into in the UK, which in itself slows down the overall maturation.” The last six months, however, have brought about a change. “There are now clear goals and programs for business. An almost militant approach to protocols. It’s starting to feel like the rest of the EU and Canada.”

© Trichome Solutions

Capitalization and cultivation
Early investment in cannabis in the UK came largely from private capital, and the gap between capitalization and cultivation know-how cost many operators dearly. Consultants were brought in to design and build the facilities, but rarely stayed to operate them. The result was a facility that had to be rebuilt almost as soon as it opened. “A lot of adjustments, changes in workflows, logistical expansion,” says Alexander. “This, of course, requires more capital. This delays profitability and, in some cases, leads to employee burnout.” The model he believes in is the owner-operator structure that has worked in markets such as the US, Canada and Thailand.

In terms of cultivation, genetic selection and post-harvest are where Alexander gives most of his attention. Seasonal changes in the UK favor indoor parameters where possible, although low-light greenhouses have worked for some operators with adequate supplementary lighting. Getting the right genetics for the specific market drives early success and patient retention. Post-harvest, however, he believes the sector is constantly underestimating. “I focus a lot on preserving the plant material and maintaining its chemical profile, particularly cannabinoids, terpenes and volatile sulfur,” he says. “Even simple things, like having enough space to dry properly, seem like common sense. But unless you’ve actually done it, you don’t always realize how important those details are to the quality of the final product.”

UK cannabis demand
Patient demand in the UK has been shaped by the equity market, and licensed operators are working to close this gap. The dynamics here are different from other markets. In Germany and Canada, THC content drives purchasing decisions. In the UK, Alexander is seeing more focus on taste, aromas and the overall experience. “With the amount of choices coming in through imports, people are finding their own strains and becoming more selective,” he says. Closing this gap, in his opinion, involves the farmers as much as the prescribers. “Patient education and support should come from doctors. Producers should teach them about their products. I think growers should invite prescribers more often.”

Over the next three to five years, Alexander expects reliance on imports to ease as domestic supply chains develop and the market stabilizes. He says that there will be operators who come out from the other side, specialized ones. R&D, heritage genetics, premium indoor and post-harvest optimization. “We are now working in the international cannabis industry,” he says. “With comparisons, going on a flight, there is no room for complacency. The operators who find their niche and really excel in it will be the ones who build a strong identity and remain competitive in the cannabis space.”

For more information:
Trichoma solutions
(email protected)
trichomesolutions.com
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DC Mayor Proposes To Let Medical Marijuana And Alcohol Companies Partner On THC Drinks

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The mayor of Washington DC is proposing medical marijuana companies partner with local breweries and distilleries to produce cannabis-infused and non-alcoholic beverages for sale in the nation’s capital.

Under the partnership envisioned by Mayor Muriel Bowser’s (D) Medical Cannabis Beverage Products Amendment Act of 2026, alcohol companies can apply for a medical cannabis production endorsement at a cost of $500 per year to manufacture cannabis beverages, and medical marijuana companies can apply for a $1,000 annual endorsement to import cannabinoids for production.

All beverages would have to be tested by a locally licensed laboratory, and there would be a six percent sales tax on beverages.

“This is an opportunity to support two local industries and keep businesses in DC,” Bowser said in a press release. “We have great local brewers and distillers in our city, we have a strong medical cannabis market, and this is a new opportunity for those two markets to collaborate and create a safe, smoke-free alternative for DC patients”

Breweries and distilleries would not be able to sell cannabis beverages directly to consumers, and the finished products would instead go to medical marijuana manufacturers for testing and distribution.

Sales would be limited to registered medical cannabis patients through dispensaries, and drinks could not be purchased at bars, restaurants, liquor stores and grocery stores.

“It makes sense for the District’s medical cannabis and alcohol manufacturing industries to collaborate to produce medicinal cannabis beverages,” said Fred Moosally, director of the Alcoholic Beverages and Cannabis Administration. he said. “Providing a legal way for our local breweries and distilleries to use their expertise in beverage production is the next step in reaching DC’s medical cannabis market and supporting our local business ecosystem.”

A press release from the mayor’s office said the proposal “works to solve the manufacturing challenges of the medical cannabis industry while providing additional revenue for DC’s local craft beverage producers.”

“Using the existing local bottling infrastructure, DC will expand smokeless therapeutic options for medical cannabis patients, provide additional revenue for the local industry and continue to grow the District’s economy,” he said.

The legislation is now before the District of Columbia Council for consideration.

Although Congress has consistently blocked DC’s legalization of recreational marijuana sales with a pilot approved each year, local officials have worked. expand access through the existing cannabis market for example, allowing residents and even visiting tourists to self-certify without the need for a medical recommendation.

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We’re a small grow, which means we can control things very well

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At 5,000 square feet, Flora Arbor is about as small as a licensed cannabis grower can legally get. That’s not the problem the company is trying to solve. “We’re a very small breed, which means we can control things very well.” he says David Myrowitz, director of cultivation. “It also means that we have to be successful in every round.” Three flower cells, collected in three weeks. There is no such thing as a bad lot to disappear into a larger average. Every shift counts, and the operation is built around that reality.

It starts in the pump room
Reverse osmosis water is fed into holding tanks, nutrients are mixed by an Agrowtek fertigation machine, and the entire system runs from a GCX controller that monitors moisture sensors, dissolved solids, and soil temperature in every room. Canopy sensors feed directly into HVAC, which Flora Arbor runs on Cultiva units. “If you talk to any grower, any grower, they’ll tell you the number one thing for successful growing is having a good HVAC system,” says David. “There is somewhere that we don’t have expenses.”

© Flora Arbor

Genetics and cells
Mother plants are removed every three to six months, so cuttings are always taken from young stock. The clones move from the humidity domes to a humidity-controlled room, then to the vegetables, where a crop-correction protocol runs several irrigation streams per day to encourage growth. Moisture sensors in the grow bags track each drying cycle, and daily watering patterns are revised based on the goals of the grow system.

The flower rooms have a double-level system, with taller plants at the bottom, shorter ones at the top, grouped to keep microclimates outside and an even distribution of light. The second mesh is lowered as the plants develop to give each bud site its own square and keep airflow moving through the canopy.

In a recent route, rooms from different phases of the cycle were working at the same time. Hawaiian Rain has been crossed with permanent marker, disk chips, cereal milk. David pointed to the development of crystals in the Hawaiian Rain cross, the citrus resin charge of Disco Fries, the height management challenge of pushing a cultivar as high as possible without burning them in the lights. “We try to have a nice spread of genetics, a nice representative of each flavor profile and effect, to make sure everyone can get something they like,” he says.

Crossing the finish line
Post-harvest is managed at home, by hand. The product is sorted on the cutting table A-Bd, B-Bud and cutting table, strictly separated, the grade on the label means something. The tiered structure also serves a second purpose. “We think it’s really important to make sure quality flowers are available to people of all means, not just people who can afford the premium,” says David. The three-week harvest cycle is Flora Arbor’s main argument for the consumer. Small batches, constant rotation, nothing stored.

“Every time you get a bag, it’s going to be fresh, freshly picked grass,” says David. “It’s not something that’s been sitting in some MSO’s vault for six months because they’ve collected 2,000 pounds and can’t sell it.” The bet is that in a market where no one has solved the consistency complaint, being small enough to catch all the cattle is more valuable than the economies of scale you allow to get there.

For more information:
Flora Arbor
1300 Abbott Dr, Elgin, IL 60123
847-504-8450
(email protected)
floraarbor.com

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