Curious about the “90u rosin” label you see in top Washington dispensaries? If you’re shopping concentrates at Floyd’s Cannabis or searching for the cleanest, most flavorful dab, understanding what 90u means will help you make a confident, informed choice. We’re here to simplify this essential subject for new and experienced dab shoppers throughout the Evergreen State.
What Does 90u Rosin Mean for Dab Shoppers?
“90u rosin” refers to a type of premium solventless hash rosin concentrated using a 90-micron (“90u”) screen. The “u” stands for microns, a unit of microscopic measurement (1/1000th of a millimeter), describing the pore size in specialized filter bags used to separate trichome heads from the rest of the cannabis plant during the ice water extraction process. The 90u grade is highly regarded by processors and consumers for its ability to isolate only the ripest, most resin-filled trichome heads. This typically leads to dabs known for purity, smoothness, high cannabinoid content, and robust, strain-specific flavors—especially when freshly harvested flower is used for making “live hash rosin.”
At Floyd’s Cannabis, our menu highlights 90u rosin to help shoppers spot batches with especially high-quality source material and careful processing. This focus on quality extraction is part of why we’re a trusted source for solventless concentrates in Washington State.
The Basics of 90u: Micron Sizes & Why They Matter in Rosin
Hash makers select from different micron screen sizes during the “bubble hash” (ice water hash) washing process. The typical size range is 25u to 159u, but 90u is singled out for great balance between purity and yield:
- Trichome heads, where cannabinoids and terpenes are most concentrated, usually fall between 73u and 120u—with the 90u fraction often considered a “sweet spot.”
- 90u screens help maximize purity, ensuring minimal plant material and lipids in your rosin.
- This process is entirely solventless, relying only on ice, water, gentle agitation, and mechanical filtration to preserve the plant’s profile.
For many Washington dab aficionados, 90u rosin stands out as the most flavorful and potent option for dabbing. Our customers at Floyd’s Cannabis regularly seek out these offerings when browsing the concentrates menu by potency or effects.
Step-by-Step: How 90u Rosin is Crafted in Washington State
Each batch of 90u rosin goes through a multi-stage process designed to protect both flavor and cannabinoid integrity. Here’s a simplified breakdown:
- Fresh-Freezing Harvest: Cannabis plants are harvested at their peak, then flash-frozen (if making live rosin) to maintain terpene and cannabinoid content.
- Ice Water Extraction: Frozen plant material is gently stirred in ice water baths to detach trichome heads from buds and sugar leaves.
- Micron Filtration: The water/trichome slurry is filtered through stacked bags—for 90u rosin, the best fraction is collected from the 90-micron screen, which catches optimal-sized trichome heads. Other screens (25u, 73u, 120u, and more) capture various sizes and can be used for full-spectrum or other grade products.
- Drying: The 90u hash is carefully dried, usually in cold, freeze-dry environments to avoid degrading terpenes.
- Rosin Pressing: The dried hash is pressed between heated plates (typically between 180–220°F) using hydraulic pressure (500–2000 PSI) to create solventless rosin. This gentle heat and pressure method maximizes both preservation and extraction.
- Lab Testing: In Washington, all retail concentrates, including 90u rosin, are batch-tested for potency, residuals, and contamination. Potency can vary, but premium 90u rosin often tests between 70–85% total cannabinoids with robust, batch-specific terpene profiles.
All 90u rosin products sold at Floyd’s Cannabis undergo this rigorous quality and safety testing, reflected on the product’s Certificate of Analysis (COA).
90u vs. Other Micron Grades: What Sets 90u Rosin Apart?
The micron size listed on a rosin product is a primary indicator of both the extraction’s selectivity and the type of consumer experience to expect. Here’s a clear comparison of common hash rosin grades in Washington shops:
| Rosin Grade | Micron Size | Material Sourced | Common Consumer Feedback | Typical WA Price Range (per gram) |
|---|---|---|---|---|
| 90u 1st Pull | 90u | First wash, ripest trichome heads | Smooth, clean flavor, very potent, strain-forward | $60–$90 |
| Mixed Micron (Full Spectrum) | 45u–159u | Full range across several washes | Broader effects, more complex flavors, slightly less pure | $40–$70 |
| Higher/Lower Microns | 120u+, 25u–45u | Early or late washes, smaller/older trichomes | Earthier, more plant matter, rougher smoke | $30–$50 |
This is why 90u single-micron rosin often appears as the premium choice for experienced dabbers seeking the finest representation of a specific cultivar. Floyd’s customers looking for clarity and strength in their dabbing experience gravitate toward these focused, small-batch releases, often seen in our Best Sellers section.
How to Shop, Store, and Enjoy 90u Rosin at Floyd’s Cannabis
Choosing the right 90u rosin starts by exploring your options on the Floyd’s Cannabis menu. Whether you’re browsing the concentrates menu at our Burlington, Mount Vernon, Port Angeles, Pullman, or Sedro-Woolley locations, look for batch-specific information including:
- Exact cannabinoid percentages (THC, CBD, etc.).
- Strain name and extraction type (for example: live, cured, single source).
- Terpene profiles if available—many note citrus, cherry, pine, or dessert-like notes.
- Lab test certificate or QR code (COA) per Washington regulations.
When selecting from in-stock 90u rosin at Floyd’s, our medically-certified budtenders offer knowledgeable, up-to-date guidance on strain profiles and reported consumer experiences—without guaranteeing any effect or outcome.
Responsible Handling and Consumption: Tips from Floyd’s Cannabis
- Always start with a small dab (“pearl-sized” or about 0.05–0.1g) for your first try of a new batch.
- Use a clean quartz banger and maintain a temperature of 450–550°F when dabbing to preserve full flavor.
- Store rosin in an airtight, non-stick container (like silicone or parchment) in the refrigerator (32–40°F) to prevent terpene loss and texture changes.
- Keep all dabbing equipment and products out of reach of children and only for adult use—per Washington State law.
At Floyd’s, all concentrates are sourced from licensed Washington producers. We maintain high standards for product storage, handling, and transparent labeling, making sure you know exactly what you’re purchasing.
Popular 90u and Hash Rosin Options In Stock at Floyd’s Cannabis
While our shelves rotate frequently, we consistently carry solventless hash rosin—including 90u, full spectrum, and other grades—from some of Washington’s top extractors. Here are a few examples drawn from our menu:
- Flawless Cherry Rose 1g Rosin – Flawless Extracts (look for cherry, floral, and earthy notes with a high THC percentage, batch-tested for purity)
- Plume Orange Apricot 1g Cartridge – Hash Rosin – Plume (common for vibrant, citrus-forward terpenes and clean vaporization in a vape format)
- Collections Dulce De Uva x Super Boof 1g Rosin Infused Preroll (premier combination of premium concentrate with top-shelf flower)
To browse current inventory and see what’s available right now, view our concentrates menu or check featured staff picks for examples of customer favorites.
Best Practices for Shopping Rosin in Washington
- Check batch info: Look at strain, lab results, and extraction method on the label.
- Shop fresh: Rosin is best enjoyed when fresh, so buy in smaller amounts if you dab infrequently.
- Store properly: Avoid excessive heat and humidity after purchase.
- Ask questions: Floyd’s expert staff is always happy to explain what “90u” means for each product and help you compare against other options like live resin or wax. (See our guide on Live Resin vs Hash Rosin for even more insights).
FAQ: 90u Rosin and Dab Concentrates in Washington
What makes 90u rosin different from regular rosin?
90u rosin is pressed from hash collected through a 90-micron filter bag, capturing medium-large, mature trichome heads with the highest cannabinoid and terpene concentrations. This creates a cleaner, smoother, and more flavor-forward dab compared to mixed or lower-grade micro fractions.
How can I tell if a concentrate at Floyd’s is high quality?
All concentrates at Floyd’s Cannabis include lab-tested cannabinoid and terpene percentages on packaging or menu listings. Shoppers can also check for clarity and freshness, ask our crew about batch specifics, and compare staff picks to see popular selections. Transparency and compliance are our priorities.
Is 90u rosin suitable for all concentrate consumers?
90u rosin appeals to both enthusiasts and newcomers who want top flavor and purity. As with any cannabis product, start low and go slow. If you’re unsure, ask a Floyd’s staff member for advice tailored to your preferences and comfort level.
Are there other types of premium hash rosin?
Yes, full-spectrum (45u–159u) and single-source rosin are also popular, as are live hash rosin products made from fresh, uncured flower. Explore more in our Concentrates 101 blog.
Can I browse by cannabinoid content or strain before visiting a store?
Definitely. Shop our online menu by potency, price, or category. All items reflect real-time inventory, so you can order for quick in-store pickup across all Floyd’s locations in Washington.
Ready to explore the best 90u hash rosin and other premium dabs? Check the live menu at Floyd’s Cannabis for current selections, daily specials, and our expert team’s trusted recommendations. Our commitment is to transparency, responsible sales, and quality for every shopper in Washington State.
For use only by adults 21 and older, or qualifying patients 18 and older with valid medical authorization. Keep out of reach of children. Cannabis products may be intoxicating and may be habit forming. Do not operate a vehicle or machinery under the influence of cannabis.