Limestone fillers: safety testing comes as standard


To guarantee that our limestone and the micronization process are consistently of top quality and comply with relevant industries’ production standards and regulations, we perform regular checks and tests

Our physico-chemical analytical laboratory

We carry out physical and chemical testing in-house with the help of cutting-edge equipment like colourimeters, laser diffraction spectrometers, X-ray fluorescence spectrometers, Los Angeles test equipment (steel drum and balls), micro deval test equipment (hollow drums, steel balls), Proctor compaction test equipment (Proctor hammers), Flakiness index test equipment (bar sieves), Methylene blue value test equipment, (electric stirrer, dispenser).

Safety and compliance of micronized products

We also have annual and twice-yearly checks for dioxin and heavy metals performed by independent laboratories accredited by the relevant ministry of the country in which our client is based.
Our attention to detail, the quality of our products and our certifications all bear witness to the level of expertise we bring to this area.

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Carbocia, the specialists in limestone fillers

In terms of particle size, uniformity and consistency, colour, flowability and chemical composition our micronized limestone fillers (ranging in size from a few microns to 4 mm) are perfectly suited to agricultural and industrial uses, meeting the specific standards and requirements of these sectors. We are able to operate on a continuous production basis and boast an integrated logistics infrastructure.

Contact us


We sell top-quality limestone fillers extracted from the Carrières de la Vallée Heureuse quarry in France’s Pas-de-Calais area. The intrinsic physical and chemical propertiesof our limestone and our micronization techniques are of major benefit to many industries. We shift our focus and adapt our products to keep pace with ongoing technological progress thanks to our partner CVH’s laboratory.

Our products

Our limestone has a content of over 96% CaCO3. This extremely high level allows us to meet the specifications of the industrial and agricultural sectors. The particle size of our fillers meets all relevant product requirements and complies with all standards and regulations currently in force. 

Animal Feed Find out more
Grouts & plasters Find out more
Fertilizers & agriculture Find out more
Carpet backing & rubber Find out more
Precast concrete/concrete Find out more
Asphalt Find out more
Sealants/roofing Find out more

Carbocia in pictures