Knowing how to use a rosin press effectively requires balancing heat, time, and pressure to achieve the best quality rosin from your cannabis material. Your goal is to achieve the highest yields, all the while preserving the terpenes and cannabinoids that define the plant's flavors and potency.
Rosin is a cannabis concentrate that is produced by melting and squeezing the resin out of the trichomes mechanically. By calibrating factors such as dwell time, temperature, and pressure, extractors can achieve a pure and effective product that will delight consumers and meet professional standards.
Choosing a Rosin Press
Rosin presses come in all shapes and sizes. However, the quality of your final product relies greatly on the precision of your press. To ensure a good setup, make sure you are on a flat, clean surface and follow the manufacturer's instructions to the letter.
Rosin presses come in manual, electric, hydraulic, and pneumatic varieties. Manual and electric presses are better for smaller-scale work and are more affordable. Hydraulic and pneumatic presses are better for commercial applications and are more precise.
When choosing a press, look for plate size, temperature control, pressure capacity, and a frame that will withstand regular use. We offer premier long-lasting, industrial-grade solventless extraction equipment, designed by engineers and made in the USA. Our rosin presses feature modular and scalable designs, recipe-driven controls for consistent results, and high-quality stainless steel to ensure durability and sanitation.
Pressure Control: Gauge Pressure vs Platen Pressure
Pressure is a critical factor in the rosin extraction process. Understanding the difference between gauge pressure (the pressure applied by your press) and platen pressure (the pressure exerted on the plant material) is essential.
If your press is applying 20-tons of pressure on a 2X2 inch puck, it is not the same as applying the same amount of pressure on a 4x4 inch puck.
Knowing how to calculate the platen pressure will make the process more precise while avoiding blowouts.
The Platen Pressure Formula
You are typically looking for a platen psi of 600 to 1000 to meet industry standards for flower rosin and 300 to 700 PSI for hash.
To calculate this value, use the following formula:
Platen PSI = (Gauge reading x Piston area) / Puck surface area
Temperature Control: Balancing Terpene Preservation and Yield
Temperature determines the fine line between your product's final yield and quality.
Lower temperatures preserve terpene flavors and aromas, while higher temperatures increase yield.
- Cold pressing (140-180 degrees Fahrenheit): Preserves the maximum amount of flavor, but usually requires longer pressing time. The resulting rosin has a budder consistency.
- Hot pressing (180-220 degrees Fahrenheit): Offers higher yields and is obtained with shorter pressing time; it is most commonly used for flower rosin. The resulting rosin has a shatter consistency.
Pre-Press Molds
Creating a uniform puck using a pre-press mold will ensure optimal pressing by removing air pockets and allowing heat to be distributed uniformly across the material.
Collection Systems
Part of your press setup also involves ensuring that everything is ready for the final stage of your process: rosin collection. For this, you need to have prepared beforehand where your rosin will be collected as you press your cannabis.
High-quality parchment paper is the primary choice for collecting the freshly pressed cannabis extract. To collect all the rosin and avoid overflow or spills, it is important to fold the parchment paper properly around your puck.
Commercial extractors use folding techniques that provide “directional flow.” This allows the rosin to flow away from the heated plates quickly, avoiding overheating.
Accessories and Tools
Depending on what is included in your rosin press, you may need to purchase additional accessories and tools:
- Gloves
- Thermometer
- Humidity meter
- Parchment paper
- Rosin/micron bags
- Collection tool
- Storage jars and a cooling tray
- Alcohol for clean-up
Preparing Your Starting Plant Material
The quality of your final product will depend on the quality of your starting material. Rosin can be made from different cannabis plant materials. The most common are flowers, bubble hash, and dry sift (or kief). Each type of material has different characteristics and requires different preparation and calibration in your rosin press.
What makes rosin so popular with today's consumers is the fact that it is much “cleaner” than solvent-based extractions. While residual solvents are purged after extraction, states have wildly different thresholds for “acceptable” concentrations of residual butane, ranging from 12 ppm in Massachusetts to 5,000 ppm in California (page 082001-3 of the PDF). This issue is sidestepped completely with solventless extraction techniques like rosin pressing.
The starting material must also be top-grade for the final concentrate to pass lab testing, because the rosin pressing process doesn’t eliminate pathogens. This is another factor that gives rosin its premium status.
For a deeper dive into different types of rosin and their characteristics, read our guide: What Is Rosin?
Humidity
Keep humidity in mind when preparing your plant material. If the humidity is lower than 55 percent RH, the plant material will reabsorb the rosin like a sponge due to cannabis's desiccant properties. If the material is too humid (70 percent RH), this will create steam between the plates, causing the terpenes to overheat and the final product to be compromised.
- Flower rosin: You want an optimal humidity of around 60 percent.
- Bubble hash rosin: Make sure the trichomes are completely dry to avoid steaming.
Micron Bag Selection
Using the wrong micron size for your rosin bag will result in blowouts or leakage. Different-sized micron bags are important for allowing rosin through or filtering out the lipids and chlorophyll. The larger the holes, the more is allowed through. This results in a higher yield but not necessarily a purer product.
Depending on your initial material, ensure you use the correct micron size to achieve optimal yield and filter out impurities, maintaining quality. The following are widely accepted micron ranges:
- Flower: 90-160 microns
- Bubble hash: 25-45 microns
- Kief: 25-90 microns
The Rosin Extraction Process Step-by-Step
Once you have set up your equipment and prepared your plant material, you are ready to start.
- Warm-up: Pre-warm your material to get the oil flowing. Place the puck with your plant material on the press and expose it to heat for 30 to 60 seconds without applying pressure.
- Ramp-up: Once the material has warmed and some liquid is starting to flow, increase the pressure gradually. It is important to perform this step slowly and steadily to avoid bag blowouts.
- Press: Taking into account your starting material and your equipment's instructions, reach the optimal pressure and maintain it for the specified amount of time.
Below is a table showing the optimum time, temperature, and pressure for different rosin extractions:
|
Material |
Temperature |
Platen PSI |
Time (Seconds) |
|
Flower |
180°F - 220°F |
1,000 - 2,000 |
60 - 120 |
|
Hash/Sift |
140°F - 190°F |
300 - 900 |
90 - 180 |
|
Live Rosin |
130°F - 170°F |
< 500 |
120+ |
- Collect: Collecting the rosin is most commonly achieved by scraping the rosin off the parchment paper with a collection tool. If the rosin is sticking, putting it in the freezer for 30 seconds will cool the extract enough to make it easier to collect.
- Clean: Wipe the plates while they are still warm using 99 percent isopropyl alcohol. Do this regularly to avoid a buildup. Never use abrasive materials on your plates.
After Pressing: Evaluating Quality, Yield, and Troubleshooting
A successful result is one where you obtain the highest rosin yield, without sacrificing the quality of your final product.
Yield Benchmarks
For high-quality flower rosin, you are looking at an optimal yield of 15 to 25 percent return. For more refined starting material, such as hash, you should be aiming for 60 to 80 percent yield. If you are not achieving satisfactory yields, this is most likely caused by high humidity in the starting material.
Visual and Sensory Quality Checks
High-quality rosin is clear, golden to amber-colored, and has a smooth, consistent texture. Plant contamination in your rosin can generally be seen with the naked eye, resulting in a darker or greener color, excessive nucleation, or a chalky or greasy texture. This is often caused by high temperatures, a long pressing time, or a wrong-sized micron rosin bag.
Professional-Grade Quality
High terpene expression is a sign of quality rosin. This can be detected through smell but also through lab analysis such as gas chromatography and mass spectrometry. A lab will also measure plant contaminants, lipid and ash content, and provide you with the precise chemical profile of your final product.
Best Practices: Rosin Storage, Curing, and Textures
How you store your freshly pressed product has a huge effect on the quality and characteristics of your rosin. As soon as the rosin is collected, a process must be followed to cool and cure the rosin, ensuring optimal stability and shelf-life.
Rapid Cooling and Collection
Cooling the rosin quickly stabilizes the oils, stops the “cooking,” and allows for easier collection. This can be done using a cold plate or simply by placing the recently pressed rosin in the refrigerator for 30 seconds.
The rosin can then be collected and immediately stored in the freezer to preserve its chemical structure as well as its shatter texture. This storage technique is known as the “fresh press.”
Curing Techniques (Jar Tech)
- Cold cure: The rosin is placed in a sealed glass jar at cooler temperatures (50 to 70 degrees Fahrenheit) for several days to a week. This causes the terpenes to “sweat” and the THCA molecules to separate and crystallize. This is the chemical process of nucleation, which is highly valued for its longer shelf life. The final product is usually then whipped into a creamy consistency of budder or badder.
- Warm cure: The rosin is sealed into a glass jar that is heated to 120 degrees Fahrenheit. This causes the THCA in the rosin to turn into granules, producing a rosin jam texture.
Safety Tips
Ensuring your safety and that of anyone operating the rosin press is paramount:
- Always follow the manufacturer's guidelines.
- You are working with heat and pressure: keep fingers away from the plates when the press is in use.
- Use protective gear such as glasses and gloves.
Mastering Rosin Extraction
Producing the best-quality rosin involves not only precision and patience, but also having professional equipment and premium starting material. Investing in the right solventless extraction equipment is the first step in ensuring the right balance between temperature, time, and pressure.
Look for high-end rosin presses with recipe-driven control, designs that support closed-loop workflows, and allow you to scale up your production. This will ensure that you meet industry standards and delight consumers with consistently top-quality rosin time after time.
