4. Install tubing to the Buchner funnel or the Buchner flask and then connect the tube to the vacuum pump

5. Place a piece of cardboard (a pizza box works well) on a table and then put the 25u nylon drying screen on top of that. You can cut the nylon drying screen to fit perfectly inside of the Buchner funnel if you want it to lay completely flat.  I have been using The Press Club 5”x5” rosin bags and they work great. 

Buchner Funnel Tech

With our supplies assembled and fully set up in a clean space, it's time to get to it. Here's the process for drying wet bubble hash with Buchner Funnel Tech.

1. Now it's time to pull the hash out of the bags. Using a spoon, pull the hash out of the bag with some water still in it, it doesn't have to drip-dry completely.

2. Move the hash over to the nylon drying screen and place it on the screen

8. Run the vacuum pump for 3-10 minutes depending on the amount of hash, how wet it is and what your relative humidity is. This is the stage that requires a little bit of practice and finesse to get it dialed in for your environment and the material that you are using. 

9. After the material is finished in the Buchner funnel, pull the nylon drying sheet and the hash out of the funnel and place it onto a piece of cardboard. You can then chop up the hash with a knife and break it down some more. Creating more surface area will allow it to dry faster. 

10. Sometimes the material will be able to be sieved after it comes out of the Buchner funnel, which helps it dry even faster.  Most of the time the material needs to be pulled out of the Buchner funnel, then cut up and allowed to dry a little bit longer before it is able to be sieved.

Learn more about sieving in How To Properly Sieve Bubble Hash for Air Drying

I use a wine fridge to put the material in after it’s sifted. I sift directly onto a sheet of parchment paper and then slide that onto one of the shelves of the wine fridge.  Placing the parchment paper on a mesh cookie cooling rack prior to placing the hash into the wine fridge will help with airflow and drying. 

Learn more about wine fridges in How To Use a Wine Cooler To Dry Bubble Hash.

Conclusion 

The Buchner funnel doesn’t dry the hash completely, but it does help get a lot of water out of the material in a very short time. This helps to reduce the overall drying time and it also helps to reduce contamination issues with mold growth. 

If you're looking for a way to decrease your bubble hash drying time without adding several thousand dollars to the budget with a freeze dryer, buchner funnel tech may be your answer. 

More about Tyler:

My journey into the cannabis industry began in 1995 when I germinated my first cannabis seed that I found in a bag of brick weed.  Growing up in an agriculture family I already had experience gardening and working in our families sugar beet fields, so the transition to cannabis was an easy one.

In the early 2000’s I was living in Hawaii and growing and learning how to make ice water sieved hash.  In 2008 I started a co-op of medical cannabis grow houses in Eastern Washington while attending Washington State University studying Organic Agriculture. 

My first published piece of writing came in 2010 when I had an article in High Times published about my work with Students for Sensible Drug Policy. Over the next few years I would get published and syndicated in several different cannabis industry magazines such as The Northwest Leaf, Culture Magazine, The Tacoma Weedly, The New York Times, and others.

In 2010 I was awarded the first state business license to conduct medical cannabis research in Washington State.

From 2012 to 2019 I consulted and managed several medical and recreational cannabis facilities. In 2019 I took 1st place for my GG4 Temple Ball at the Terpestival in Seattle and in 2021 I moved to California to pursue a business license to make ice water hash in the recreational market.

When I’m not making hash or farming you can find me in Santa Cruz skating the streets on my longboard, jamming out at a local club or at the beach jumping in the ocean working on my Wim Hoff technique. I also enjoy making guitar amplifiers, effects pedals and modifying vintage and contemporary guitars in my free time.

Thoughts? Let us know by joining our secret Facebook group. Hang out with a community of like-minded solventless heads like yourself. Ask our head extractor questions, share your latest press and learn from hobbyists and experts in the industry.

FREQUENTLY ASKED QUESTIONS

What is a Buchner Funnel?
A Buchner Funnel is a piece of lab equipment, made commonly with porcelain but also available in glass, that's commonly used as a component in filtration. 

How do you use a Buchner Funnel to dry bubble hash?
Attaching a vacuum pump to a Buchner Filter with wet bubble hash inside is a way to quickly draw out moisture and decrease drying time. 

What do you need to dry bubble hash with a Buchner Funnel?
You need the Buchner Funnel, a vacuum pump, a tube to connect the two, some 15-25 micron rosin filter bags or screens, aluminum foil, a rubber band (or hair tie), and wet bubble hash.

How much does it cost to set up a Buchner Funnel for drying bubble hash?
It costs less than $300 to set up a Buchner Funnel and vacuum pump for air drying bubble hash. 

What is the benefit of drying bubble hash with a Buchner Funnel?
The main benefit is a vast reduction in drying time, which reduces the risk of mold growth and excessive oxidation with a prolonged drying time in a cold room.