Rosin is a type of solventless cannabis concentrate, which means that it doesn’t require the use of solvents to extract the THC and other cannabinoids from cannabis flowers. Rosin can be extracted using a combination of heat and pressure. The end product is a sticky, viscous substance that ranges in color from yellow to dark brown and can be consumed like any other concentrate.
Rosin pressing is a technique used to extract cannabinoids and terpenes from raw plant material. This process is accomplished with a rosin press, which uses only heat and pressure to separate the end product (rosin) from the source material. Rosin is highly concentrated, and THC levels can easily rise upwards of 60%.
There are different styles of rosin pressing, and it all depends on your method of packing the source material into the rosin bags and the placement of the rosin bags between the plates of the press.
The three most popular styles of rosin pressing include:
Traditional flat pack or pillow-style rosin pressing is the most common and easiest to use. It’s a great way to be able to extract your resin quickly without having to use a lot of material. The traditional Flat Pack style is recommended for pressing dry sift or bubble hash. However, if you’re pressing flower rosin, Bottle Tech or Chottle Tech are the ideal options.
Bottle Tech Style (BTS) for rosin pressing is a technique in which rosin bags are filled and placed vertically instead of the standard horizontal position used in the traditional Flat-Pack style. The vertical positioning allows more space to press multiple bags on the press in one go. This method will enable extractors more control over pressure for consistent results. Bottle Tech Style is not recommended for pressing kief, sift, or hash. Pressing rosin bottle tech style is recommended for pressing flower.
Chottle Tech Style for rosin pressing is a unique technique that is very popular because it saves a lot of time. The Chottle Tech Style is unique because you will need to snip off the bottom of the rosin bag to create a tube. This reduces the folds in which rosin can get trapped and maximizes yield. In addition, the Chottle Tech Style allows for better control over pressure resulting in even more quality and consistent end product.
It is essential to choose suitable rosin bags. The micron size of the bag will give you a significant influence on your final item quality. The higher the microns will be, the more likely it is that quality will be compromised. We recommend using 37µ, 50µ, 75µ, 90µ, 120µ, 160µ, or 220µ microns.
Use 90µ or lower for finer material like dry sift or bubble hash. Then use 90µ or higher for flower material. The lower the micron, the lower yield you will produce, but the quality will be higher as less plant material flows through the rosin bag and into your end production (rosin).
Ensure the source material is adequately humid with about 60% to 70% relative humidity. If the material is too dry, the terpenes will burn during the pressing process, which means less yield. If the material is too wet, the rosin will likely be runny and produce a reduced yield. To increase the humidity of your flower, you may use terracotta humidity stones or a humidity pack.
You want to make sure you apply pressure correctly. How you apply pressure to your rosin press could make all the difference in the end product. First, apply minimal pressure that is enough to hold your rosin bag in place. Let the bag sit on the heated plates for 30 seconds to warm up the flower. Next, increase pressure gradually and steadily. This is key as it will ensure that your flower is pressed evenly.
Do not let the press sit for too long in between increasing pressure, as this will cause a build-up of air packets inside the rosin bags, which could clog up and affect the quality of the end product. The total press will last anywhere between 2-4 minutes.
You should exert as much pressure as possible without creating a blowout. Blowouts can arise in several ways, including by exerting too much pressure. If you’re using a pressure gauge, a 7-gram press usually tops out around 3 tons. If you are pressing over 7 grams, adjust your maximum pressure accordingly.
Set the temperature of the press between 160℉ and 220℉. Lower temperatures help preserve more flavor in the end product than when higher temperatures are used. Higher temperatures may produce higher yields, but the result would likely be runny that would not hold well. It’s a fine balance to achieve just the right temperature and yield, and this process requires quite a bit of experimenting.
To sum up, there are many styles of rosin pressing, and they all work slightly differently. Flower extractors’ most popular pressing style is the chottle-tech style because it uses less filter material. This means that there is minimal loss of rosin to folds in the filter bag, which results in maximum yield. There is no one-size-fits-all when it comes to rosin pressing, so try out the various styles to figure out which one works best for you and your needs.
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