Hash maker: the 4 steps behind a batch of CBD hash

The term is English and names a craft; it carries no legal status. The hash maker receives dried or frozen flowers and detaches the trichomes, the tiny glands where the plant stores cannabinoids and terpenes, to make resin. The process is purely physical, with no solvent and no chemical reaction. A hash is therefore only as good as its starting material and the precision of the sorting.

French law writes this split between growing and processing into the rules. The decree of 30 December 2021 reserves the cultivation of hemp flowers and leaves to active farmers, as defined by European and French rules. A separation workshop therefore buys or receives its flowers from a farm. Subcontracting is the usual way the trade works: a brand either hands the separation to a workshop or buys a finished batch.

We found no diploma or register specific to this craft in France. Skills pass on through practice, and workshops build a name through the brands that sell their batches.

Since a hash concentrates a flower's trichomes, a flower with few trichomes makes a poor hash. A Canadian team examined the trichomes of two varieties under the microscope, publishing in the Journal of Cannabis Research in 2023. Capitate-stalked trichomes carry most of the resin, and their heads measured 40 to 110 microns, averaging 75 or 90 microns depending on the variety. The sieves work at that scale.

Next comes the state of the material. Dried material suits dry sieving. Material frozen whole just after cutting becomes WPFF (whole plant fresh frozen), the starting point of so-called frozen hashes. Aroma is the reason to freeze. A 2024 study in Plants found that monoterpenes, the most volatile odour compounds, suffer more from drying than sesquiterpenes, with β-myrcene losing 3 to 30% depending on variety and method. Freezing avoids drying altogether, as long as the cold chain holds until washing.

Separation is the core of the work, and two routes dominate a catalogue of CBD resins.

In ice water, cold stiffens the trichomes and stirring breaks them off. The suspension then runs through stacked bags from the widest mesh to the finest, and each bag retains what its mesh stops. A short wash mostly frees ripe heads. A long wash also tears off leaf fragments, so the extra yield costs purity. Dry separation follows the same logic with sieves and no water.

Most heads are under 120 microns, so a 120u fraction collects mainly the largest heads and clumps of resin. The 73 and 90 micron meshes retain most heads, which is why they are linked with the full melt grade. The guide 90u or 120u covers the whole scale.

Resin comes out of the water soaked. The hash maker crumbles it onto a fine screen and dries it in the cold, in air or by freeze-drying. Any moisture left behind exposes the slab to mould, so this step decides how well it keeps.

Curing then shapes the product. Hand pressing turns the resin into a supple slab. A full melt fraction vacuum-sealed and kept cold for weeks fuses into piattella, a creamy paste obtained without heat or heavy pressure. The catalogue's product pages advise storing pressed resins at 10 to 20 °C. For a slab that hardens or turns sticky, the article on hash that is too hard or too soft explains how to temper it.

Building the batch is the step you see least. One wash fills several bags, of which only one or two reach full melt. The hash maker groups material worked together (same material, same mesh, same date) under one number, which follows the product to the laboratory and onto the label.

The number is what lets anyone verify the work. A lab test measures a batch and says nothing about skill: it gives the cannabinoid content, the Δ⁹-THC and sometimes the terpenes. Three resins from the catalogue, as their pages read on 23 September 2026, show what a batch page contains.

The product name gives none of these values. The comparison frozen, piatella, 120u, static sets them against price, and the CBD resins and hash category lists the products.

Mila Jansen was born in Liverpool in 1944 and settled in Amsterdam. In 1994 she developed the Pollinator, a rotating drum modelled on a tumble dryer that separates trichomes from dry material mechanically. According to the World of Cannabis Museum, she went on to launch the Ice-O-Lator bags in 1998 and the Bubbleator in 2005. Her bags gave their name to a method.

Frenchy Cannoli was born Didier Camilleri in Nice in 1956 and died in San Francisco in July 2021. He learned the craft on long journeys from Morocco to India and the Himalayan foothills, then settled in Northern California. The Anderson Valley Advertiser obituary says his nickname came from the way he rolled resin, like the Sicilian pastry. He taught Californian growers and promoted artisanal hashish.

French law gives the hash maker no specific status; it regulates the material and the product. The 2021 decree sets a maximum of 0.30% Δ⁹-THC for varieties, hemp extracts and products containing them. The threshold is therefore measured on the finished product, not on the variety: the official catalogue guarantees genetics, the batch analysis guarantees a content. The Conseil d'État annulled on 29 December 2022 the same decree's ban on selling raw flowers and leaves.

MILDECA, the French interministerial mission against drugs, sets out the rest of the framework: no therapeutic claim may be made for a product containing CBD, on pain of criminal penalties. A hemp resin is therefore sold as a non-food product for adults only, described by its method and its analysis. Our article on whether CBD hash is legal in France details the three texts behind its legality.