1. Growing hemp: an essential starting point

The quality of a CBD oil depends above all on the plant used.

Hemp grown in Europe comes from authorised varieties selected for their low THC content. The flowers are the part richest in cannabinoids.

Key factors :

• plant genetics
• growing conditions (outdoor, greenhouse, indoor)
• soil quality
• farming method

A high-quality raw material is essential to obtain a stable, homogenous extract.

2. Harvesting, drying and preparation

After harvesting, the plants go through a transformation phase called post-harvest.

Steps :

• Controlled drying (moisture reduction)
• refining (stabilisation of compounds)
• biomass grinding

This preparation optimises extraction by making the compounds more accessible.

️ 3. CBD extraction: a key stage in the process

Extraction involves isolating the cannabinoids and terpenes contained in the plant.

There are several methods, but they are not all the same.

Solvent extraction (old method)

Uses solvents such as :

• butane
• propane
• ethanol

How it works :

The solvent dissolves the compounds and is then evaporated.

Limits :

• not very selective extraction
• variable quality
• now less used for premium products

Extraction with supercritical CO₂

A method widely used in industry.

Principle :

The CO₂ is placed under pressure to become a supercritical fluid capable of extracting the compounds.

Advantages :

• no solvent residues
• high purity
• controllable process

Limits :

• high cost
• optimisation needed to preserve terpenes

️ Cryo-ethanol extraction: an advanced process

Le cryo-ethanol is a modern development of ethanol extraction.

Principle

The ethanol is cooled to a very low temperature (down to -40°C).

Why is this important?

Cold :

• waxes do not dissolve
• terpenes are better preserved
• cleaner extraction

Detailed cryo-ethanol process

1. Cooling the solvent

The ethanol is brought to negative temperature.

2. Contact with biomass

The solvent passes through the plant material.

3. Rapid extraction

The cannabinoids are dissolved without extracting too many impurities.

4. Cold filtration

Elimination of unwanted particles.

5. Solvent recovery

The ethanol is evaporated and recycled.

Why this method is interesting

• better preservation of the aromatic profile
• more selective extraction
• good return
• constant quality

Cryoethanol is now considered to be one of the world's leading top-of-the-range process, often used to produce rich, balanced oils.

4. Winterisation and purification

The crude extract still contains :

• waxes
• lipids
• chlorophyll

Winterisation :

• cooling
• filtration
• purification

The result is a cleaner, more stable extract.

5. Decarboxylation

Cannabinoids are naturally present in acid form (CBDA).

Decarboxylation consists of :

• heat the extract
• transform CBDA into CBD

This stage makes the product more stable and usable.

6. Formulation of CBD oil

The extract is mixed with a carrier oil:

• MCT (widely used)
• hempseed oil
• olive oil

Objectives:

• ease of use
• standardise concentrations
• improve stability

7. Difference between full spectrum and broad spectrum

Full spectrum

• contains all the compounds of hemp
• includes traces of THC in compliance

Nobilis: Full Spectrum CBD oils

Broad spectrum

• with no detectable THC
• preserves other cannabinoids

Nobilis Broad Spectrum CBD Oils

8. Quality control and analysis

Each oil must be tested:

• cannabinoid profile
• absence of contaminants
• regulatory compliance

These analyses guarantee the quality of the final product.

9. Packaging

The oil is packaged in bottles:

• tinted glass
• dosing pipette
• practical format

Recommended storage :

• away from light
• in a dry, temperate place

Conclusion

The production of CBD oil involves a series of precise technical steps. From the cultivation of the hemp to the final product, each phase influences the quality.

Extraction methods, in particular Supercritical CO₂ and the cryo-ethanol, play a central role in preserving hemp compounds.

Understanding these processes allows us to better appreciate the differences between the oils available on the market.

️ Compliance statement

The information presented in this article is for information purposes only. It constitutes neither a promise of effect nor medical advice.