01 / Narrow selectionTier 1
119–90µ
Our narrowest selection: primarily first-wash resin from a focused collection window.
Selected for refinement
Canna Haus Farms / Field guide 03
The micron
guide.
Those little numbers on a hash jar describe a collection window. They tell you which mesh sizes were used to separate resin—not whether one strain or jar is automatically better than another.
Start with the screen
01 / The measurementWhat does
What does
“micron” mean?
A micron (µm) is one-thousandth of a millimeter. In hash making, it measures the openings in a collection screen.
During an ice-water wash, water and separated trichome heads pass through stacked mesh bags. Each bag catches material too large to pass through its openings. A 90µ screen has smaller openings than a 159µ screen.
You may see the same unit written as µ, µm, or “micron” on a label. For scale, 90 microns is 0.09 millimeter. A larger micron number indicates a larger opening, not a finer screen.
The number describes the screen—not the potency, aroma, or quality of the finished hash.
02 / Follow the washFrom plant
From plant
to collection.
For the overall sequence, see Our Process. This guide focuses on the meaning of screen sizes and collection ranges. Our process
A collection range describes the screens selected for a batch. It does not tell you how much of each fraction went into the jar.
03 / Our tier map
Read the range.
These are the collection ranges we use for our live hash rosin tiers. The bars show how broad each window is; they are a visual guide, not a purity or potency scale.
Our ranges are written from the larger number to the smaller number: 119–90µ means a collection window described by 90 and 119 microns. It describes screen sizing, not a potency percentage or the exact size of every particle in the finished product.
02 / Wider selectionTier 2
159–73µ
A broader range selected from the first and second washes, with a balance of refinement and body.
A wider resin expression
03 / Broadest selectionTier 3
159–45µ
Our broadest range, drawing from the first through third washes for a fuller-spectrum expression.
The broadest collection window
04 / Beyond the numberA range is
A range is
not a rating.
More selective does not mean universally better. A wider collection can carry a character of its own.
Start with the plant
Genetics, harvest timing, and the structure of a cultivar’s resin shape what can be collected.
Consider the full run
Wash conditions, drying, selection, pressing, and storage all influence the finished jar.
Read the whole label
A collection range does not establish potency, safety, or legal status. Lab results apply to the sample identified in the report. Lab results (COA)
05 / Put the terms in contextDifferent numbers.
Different numbers.
Different meanings.
Micron range, wash number, tier, and lab results each describe something different.
A screen size is not a lab result
Mesh separates material by size; it does not identify its chemical composition. A micron label cannot verify cannabinoid content, terpene content, or the absence of contaminants. Those questions require the relevant analysis.
Wash number is separate from micron size
“First wash” refers to collection sequence. “90µ” refers to a screen opening. One term does not supply the other, so the range alone cannot tell you which wash or washes a batch includes.
Our tier map belongs to our system
The Tier 1, Tier 2, and Tier 3 descriptions above explain how we identify our selections. They are not a standardized grading system shared by every producer. When comparing labels, read each producer’s definitions rather than assuming matching tier names mean matching material.
A wider range does not specify a recipe
A range such as 159–45µ describes the bounds of the collection window. It does not disclose equal proportions from each fraction, the number of fractions combined, or a complete chemical profile. A broad collection range and a broad cannabinoid profile are different claims.
Micron and melt are different descriptions
“Full melt” describes melting behavior and residue, while a micron range describes collection sizing. A particular number alone cannot establish a full-melt designation, and the same range can appear on different finished forms.
Read the batch as a whole
Put the range alongside the cultivar, harvest information, finished consistency, and matching certificate of analysis. Check the report’s sample identity and which tests were performed. This gives the numbers context without treating a single label detail as a complete assessment.