About us

A Message from Our CEO

Over the past forty years, I have had the privilege of successfully building or restructuring and strengthening a number of companies to create thriving organizations that remain in operation today.  In each of these projects, the success began with a great idea that was implemented by a remarkable and committed team of people. INCOA Performance Minerals is no different from my previous ventures; a great idea to manufacture a unique ground calcium carbonate with our future customers’ needs in mind.  The dedicated INCOA team has executed on this idea and created an exciting and focused company.

Our project began with the discovery of a unique limestone deposit and this discovery led to a great idea. After researching this deposit, our team learned that the unique properties of the limestone provided the opportunity to engineer ground calcium carbonate products in a totally new way that focuses on market needs. 

Our team threw themselves into this idea, researched, explored, developed, designed, and, in the end, created our InCal® products and the infrastructure to bring these products to the marketplace. 

Our successes thus far and our future successes arise from our core set of values.

We value:

  • Meeting our customers’ expectations by providing consistent and outstanding products and support
  • The creativity and dedication of our team-members
  • The unique perspectives arising out of diverse backgrounds
  • Innovation
  • Safety in our activities and facilities
  • Our neighbors
  • The environment

Our decision making, at all levels, reflects our commitment to these values and it is this commitment that has allowed us to take our great idea and turn it into a great company. 

We look forward to talking with you about your fine and ultrafine ground calcium carbonate needs and giving you a chance to get to know us better.


Steve Creamer, CEO


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.