Minerals Technologies Signs Commercial Agreement For Fulfill® High-Filler Technology With Major South American Papermaker

26^th Agreement for FulFill^® Technology that

Reduces Papermaking Costs by Replacing Fiber with Precipitated Calcium Carbonate

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NEW YORK, June 9, 2016-Minerals Technologies Inc., (NYSE: MTX) announced today that it has entered into a commercial agreement with a leading South American paper company to provide Fulfill^® E-325 higher filler technology. This is the company's 26^th commercial agreement for the technology that allows papermakers to produce quality paper at lower cost by replacing higher-cost fiber with precipitated calcium carbonate (PCC). The papermaker wishes to remain unnamed for competitive reasons.

"We are extremely pleased that this prominent South American papermaker is adopting our cost-saving technology," said Joseph C. Muscari, chairman and chief executive officer. "The continued acceptance of our FulFill^® product portfolio by paper companies worldwide further validates the value-added technology developed by MTI."

Minerals Technologies now has 10 agreements with paper companies in Asia; eight in North America; six in Europe; and two in South America. The Fulfill^® E-325 series allows papermakers to replace higher-cost pulp by increasing PCC loading levels three to five percentage points, from a typical level of approximately 20 percent up to 25 percent.

"In addition to the 26 commercial agreements we now have, MTI is actively engaged with 18 additional paper mills that are interested in FulFill^®." said W. Rand Mendez, senior vice president & managing director, Paper PCC. "We are also working with numerous other paper producers to advance our NewYield® technology that saves costs and reduces environmental impact."

PCC is a specialty pigment for filling and coating high-quality paper. By substituting PCC for more expensive wood fiber, papermakers are able to produce brighter, higher quality paper at lower cost. Minerals Technologies originated the satellite concept for making and delivering PCC on-site at paper mills, and the concept was a major factor in revolutionizing North American papermaking from an acid to an alkaline-based technology. Minerals Technologies constructed its first PCC satellite plant in 1986. Today, the company has 64 satellite plants in operation or under construction around the world and continues to lead the industry with consistent quality and technical innovation.

New York-based Minerals Technologies Inc. is a resource and technology based growth company that develops, produces and markets worldwide a broad range of specialty mineral, mineral based and synthetic mineral products and related systems and services. MTI serves the paper, foundry, steel, construction, environmental, energy, polymer and consumer products industries. The company reported sales of $1.798 billion in 2015.

For further information about Minerals Technologies Inc. look on the internet at http://www.mineralstech.com/

Contact:

Rick B. Honey

(212) 878-1831

Paul Donnelly

(212) 878-1840