MINERALS TECHNOLOGIES INC.

(Registrant)

By:

Name: Kirk G. Forrest

Title: Secretary

  Date:  April 28, 2005

Exhibit No.

Subject Matter                                                       

99.1

Press Release dated April 28, 2005

99.2

Press Release dated April 27, 2005

EXHIBIT 99.1

News

For Immediate Release
April 28, 2005

Contact:

Rick B. Honey
(212) 878-1831

MINERALS TECHNOLOGIES INC. REPORTS FIRST QUARTER
DILUTED EARNINGS PER SHARE OF $0.73 ON SALES OF $250.8 MILLION

          Worldwide sales were $250.8 million, a 20-percent increase over $209.5 million reported in the first quarter of 2004. Foreign exchange had a favorable impact of approximately $5.8 million on sales, or 3 percentage points of growth. For the quarter, operating income was $24.1 million compared with $20.1 million for the same period last year, a 20-percent increase. The company saw improved industry demand across all product lines. Growth in sales and operating income also benefited from five additional business days in the 2005 first quarter as compared with the prior year.

          "We are pleased with our first quarter financial performance," said Paul R. Saueracker, chairman, president and chief executive officer. "We saw improved conditions in the industries we serve; however, we continue to experience high raw material and energy costs. We also continue to incur start-up costs for the merchant precipitated calcium carbonate facility in Germany, as well as higher litigation expenses. Furthermore, we also incurred initial start-up costs for the two new satellite plants in China. All of these factors had an adverse effect on our operating ratios."

          Sales in the Specialty Minerals segment, which includes the company's Precipitated Calcium Carbonate (PCC) and Processed Minerals product lines, increased 18 percent to $169.8 million from $143.7 million in the first quarter of 2004. Income from operations increased 21 percent to $16.4 million from $13.5 million in the same period last year.

          Worldwide sales of PCC grew 19 percent to $134.0 million from $112.3 million in the first quarter of 2004. Foreign exchange had a favorable impact on sales of approximately 3 percentage points of growth.

          "Our Paper PCC volumes showed strong growth in North America, Europe and Asia," said Mr. Saueracker. "In addition, we are now commissioning two satellite PCC plants at paper mills in China owned by APP China, both of which should be operational by mid-year. These satellites will add 8 additional units of capacity, with a unit representing between 25,000 and 35,000 tons of PCC."

          Sales of Specialty PCC grew 19 percent to $14.3 million over the same period in 2004, as performance improved at all three of the company's manufacturing facilities for this product line.

          Worldwide sales of Processed Minerals products increased 14 percent in the first quarter to $35.8 million from $31.4 million in the same period in the prior year. This increase was attributable primarily to the continued strong demand from the residential construction-related industries and from polymer and health-care applications for the company's talc products. The company's talc sales increased approximately 23 percent to $14.0 million from $11.4 million in the prior year.

          Sales of Refractories segment products, which are used primarily in the steel industry, increased 23 percent to $81.0 million from $65.8 million in the first quarter of 2004. Foreign exchange had a favorable impact of approximately 3 percentage points of sales growth. Sales of refractory products and systems to steel and other industrial applications increased 20 percent to $64.4 million from $53.5 million. Sales of metallurgical products within the Refractories segment increased 35 percent to $16.6 million as compared with $12.3 million in the same period last year. This increase was attributable to a combination of price increases due to the substantial escalation in the cost of raw materials for this product line and volume growth. Income from operations for the Refractories segment increased 17 percent to $7.7 million from $6.6 million in the first quarter of 2004.

          "The company experienced good growth in refractory sales in all regions of the world, but we are still faced with higher costs for raw materials," said Mr. Saueracker. "The construction of a 100,000-ton refractories manufacturing plant in China is underway and is expected to be operational in the fourth quarter. We expect this facility to service the growing Chinese steel market while being nearer to our raw material supply.

          "A key development program-- our Synsil^® products family of composite minerals for the glass industry--is accelerating," said Mr. Saueracker. "On March 17, we signed a commercial contract with a glass manufacturer, which triggered the announcement that we would construct a 200,000-ton manufacturing plant for Synsil^® products in Chester, South Carolina. This merchant plant, expected to be operational during the fourth quarter, will initially provide the material to the glass manufacturer that signed a multi-year contract. The company now has four commercial contracts for Synsil^® products. We continue to run, evaluate and plan trials with other glassmakers."

          Mr. Saueracker concluded: "We are generally pleased with our financial performance for the start of 2005, especially since the first quarter has historically been our most challenging. Despite continued high raw material and energy costs, we are confident that if the economy remains stable we will continue our growth in sales and earnings in 2005."

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Minerals Technologies will sponsor a conference call tomorrow, April 29, at 11 a.m. The conference call will be broadcast live on the company web site, which can be found at www.mineralstech.com.