About us

We’re Environmentally and Socially Responsible

We understand the importance of being environmentally and socially responsible. That’s why we make it a priority to minimize the impact our operations have on the planet while maximizing the positive impact  on the communities in which we operate.

Through environmental and social baseline studies and the corresponding management plans, thoughtful water management operations, and processing technologies that leverage the natural characteristics of our mineral we reduce our energy usage, waste, impact on waters and land utilization, to develop an environmentally and socially sustainable operation.

Our product offering provides our future customers the opportunity to replace environmentally costly components in their formulation with our products further improving the environmental health of our planet.


We’re engaged in environmental monitoring and management plans to reduce our impact on the environment.


We work with the communities in which we operate to help improve the lives of those around us.


A calculated value that describes the breadth of the particle size distribution by looking at the size of the particle below which 90% of all particles are found (d90), the median and the size of the particle below which 10% of all particles are found (d10).

The Span is calculated from the following equation:

d90 = particle size below which 90 % of the particles are described
d10 = particle size below which 10% of the particles are described
d50 = particle size below which 50% of the particles are described, also known as the median

Broader distributions have a larger span while narrower distributions have a smaller span.

Level of Ultrafines

The percentage of the total distribution that includes particles that are 0.5 microns or smaller.

Some demanding applications require careful control of the level of very small particles. These particles can make the powder difficult to disperse and can actually absorb important components of formulations ultimately altering end-use performance.


The size below which 100% of the particles can be found.

Unlike most ground calcium carbonate suppliers, INCOA specifies at the 100% passing rather than the industry standards of 95% or 98% passing. We recognize that even very low levels of oversize particles can interfere with the performance of our products in your applications


The size below which 50% of the particles can be found.

This is the most common means of describing the size of ground calcium carbonate powders. INCOA describes our medians on the final product as-received by our customers. This means that the specification testing is performed on samples of the shipment before shipment on the final product not on material still in-process.