Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15 (d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days.

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition of "accelerated filer and large accelerated filer" in Rule 12b-2 of the Exchange Act. (Check one):

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Indicate the number of shares outstanding of each of the issuer's classes of common stock, as of the latest practicable date.

See accompanying Notes to Condensed Consolidated Financial Statements.

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* Unaudited
** Condensed from audited financial statements

See accompanying Notes to Condensed Consolidated Financial Statements.

4

MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
(Unaudited)

See accompanying Notes to Condensed Consolidated Financial Statements.

5

     The accompanying unaudited condensed consolidated financial statements have been prepared by management in accordance with the rules and regulations of the United States Securities and Exchange Commission. Accordingly, certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles have been condensed or omitted. Therefore, these financial statements should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2005. In the opinion of management, all adjustments, consisting solely of normal recurring adjustments necessary for a fair presentation of the financial information for the periods indicated, have been included. The results for the three-month period ended April 2, 2006 are not necessarily indicative of the results that may be expected for the year ending December 31, 2006.

     Property, plant and equipment are recorded at cost. Significant improvements are capitalized, while maintenance and repair expenditures are charged to operations as incurred. The Company capitalizes interest cost as a component of construction in progress. In general, the straight-line method of depreciation is used for financial reporting purposes and accelerated methods are used for U.S. and certain foreign tax reporting purposes. The annual rates of depreciation are 3% - 6.67% for buildings, 6.67% - 12.5% for machinery and equipment, 8% - 12.5% for furniture and fixtures and 12.5% - 25% for computer equipment and software-related assets. The estimated useful lives of precipitated calcium carbonate ("PCC") production facilities and machinery and equipment pertaining to its natural stone mining and processing plants and its chemical plants are 15 years.

     Property, plant and equipment are depreciated over their useful lives. Useful lives are based on management's estimates of the period that the assets can generate revenue, which does not necessarily coincide with the remaining term of a customer's contractual obligation to purchase products made using those assets. The Company's sales of PCC are predominantly pursuant to long-term evergreen contracts, initially ten years in length, with paper mills at which the Company operates satellite PCC plants. The terms of many of these agreements have been extended, often in connection with an expansion of the satellite PCC plant. As of April 2, 2006, the Company continues to supply PCC at one location at which the PCC contract has expired and one location, representing one unit of PCC production, at which the host mill has provided notice to the Company of its plans to cancel the PCC supply contract upon its expiration in 2006. Failure of a PCC customer to renew an agreement or continue to purchase PCC from a Company facility could result in an impairment of assets charge or accelerated depreciation at such facility.

     On March 21, 2006, the Company ceased operation of a one-unit satellite PCC facility in Park Falls, Wisconsin, after the paper company shut down its mill and filed for bankruptcy protection. The paper company is presently seeking a buyer for its mill and if successful, the Company believes it would continue to supply PCC from its satellite facility. If the Company does not resume production from its satellite facility, we could incur an impairment charge of approximately $0.6 million.

     Depletion of mineral reserves is determined on a unit-of-extraction basis for financial reporting purposes and on a percentage depletion basis for tax purposes.

     Inventories

     Inventories are valued at the lower of cost or market. Cost is determined by the first-in, first out (FIFO) method.

     Effective January 1, 2006, the Company has adopted SFAS No. 151, "Inventory Costs - an Amendment of ARB No. 43, Chapter 4." As required by this statement, items such as idle facility expense, excessive spoilage, freight, handling costs and re-handling costs are recognized as current period charges. In addition, the allocation of fixed production overheads to the costs of conversion should be based upon the normal capacity of the production facility. Fixed overhead costs associated with idle capacity are expensed as incurred. SFAS No. 151 did not have a material impact on our results of operations during the first quarter.

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     Stripping Costs Incurred During Production

     As further discussed in Note 8 to the condensed consolidated financial statements, effective January 1, 2006, the Company has adopted the consensus of Emerging Issues Task Force ("EITF") Issue No. 04-06, "Accounting for Stripping Costs Incurred During Production in the Mining Industry." Stripping costs are those costs incurred for the removal of waste materials for the purpose of accessing ore body that will be produced commercially. Stripping costs incurred during the production phase of a mine are variable costs that are included in the costs of inventory produced during the period that the stripping costs are incurred.

     As further discussed in Note 3 to the condensed consolidated financial statements, effective January 1, 2006, the Company adopted the fair value recognition provisions of SFAS No. 123R, "Share-Based Payment," using the modified prospective method. Under this transition method, stock-based compensation expense was recognized in the consolidated financial statements for stock options granted on and subsequent to January 1, 2006, based on the grant date fair value estimated in accordance with the provisions of SFAS No. 123R, and the estimated expense for the portion vesting in the period for options granted prior to, but not vested as of January 1, 2006, based on the grant date fair value estimated in accordance with the original provisions of SFAS No. 123. As provided under the modified prospective method, results for prior periods have not been restated. Prior to its adoption of SFAS No. 123R, the Company accounted for stock-based compensation using the intrinsic value method in APB Opinion No. 25 and recognized no compensation expense in its financial statements. As permitted by SFAS No. 123, "Accounting for Stock-Based Compensation," stock-based compensation was included as a pro-forma disclosure in the notes to the consolidated financial statements.

     The Company has a 2001 Stock Award and Incentive Plan (the "2001 Plan"), which provides for grants of incentive and non-qualified stock options, restricted stock, stock appreciation rights, stock awards or performance unit awards. The Plan is administered by the Compensation Committee of the Board of Directors. Stock options granted under the Plan generally have a ten year term. The exercise price for stock options are at prices at or above the fair market value of the common stock on the date of the grant, and each award of stock options will vest ratably over a specified period, generally three years.

     Effective January 1, 2006, the Company adopted the fair value recognition provisions of SFAS No. 123R, "Share-Based Payments," using the modified prospective method. Under this transition method, stock-based compensation expense was recognized in the consolidated financial statements for stock options granted on and subsequent to January 1, 2006 based on the grant date fair value estimated in accordance with the provisions of SFAS No. 123R, and the estimated expense for the portion vesting in the period for options granted prior to, but not vested as of January 1, 2006, based on the grant date fair value estimated in accordance with the original provisions of SFAS No. 123. As provided under the modified prospective method, results for prior periods have not been restated. The cumulative effect of the adoption of SFAS No. 123R did not have a significant impact on the financial statements.

     Net income for the three months ended April 2, 2006, includes $0.5 million in pretax of compensation costs related to stock option expense as a component of marketing and administrative expenses.    The related tax benefit on the non-qualified stock options is $0.1 million.

      Prior to the adoption of SFAS No. 123R, all income tax benefits resulting from the exercise of stock options were presented as operating cash inflows in the consolidated statements of cash flows. As required under SFAS No. 123, the benefits of tax deductions in excess of the compensation costs recognized for those options are classified as financing inflows on the consolidated statement of cash flows.

7

      The following table shows the pro forma effects on net income and earnings per share for the period ended April 3, 2005 had compensation cost been recognized in accordance with SFAS No. 123, as amended by SFAS No. 148 "Accounting for Stock-Based Compensation - Transition and Disclosure."

      Disclosures for the period ended April 2, 2006 are not presented because the amounts are recognized in the consolidated financial statements.

     The fair value of options granted is estimated on the date of grant using the Black-Scholes valuation model. Compensation expense is recognized only for those options expected to vest, with forfeitures estimated at the date of grant based on the Company's historical experience and future expectations. The forfeiture rate assumptions used in the first quarter of 2006 was approximately 8%.

     The weighted average grant date fair value for stock options granted during the three months ended April 2, 2006 and April 3, 2005 are $20.28 and $24.37, respectively. The weighted average grant date fair value for stock options vested during the first quarter of 2006 was $21.28. The total intrinsic value of stock options exercised during the period ended April 2, 2006 was $1.0 million.

      The fair value for stock awards was estimated at the date of grant using the Black-Scholes option valuation model with the following weighted average assumptions for the three months ended:

     The expected term of the options represents the estimated period of time until exercise and is based on historical experience of similar awards, based upon contractual terms, vesting schedules, and expectations of future employee behavior. The expected stock-price volatility is based upon the historical volatility of the Company's stock. The interest rate is based upon the implied yield on U.S. Treasury bills with an equivalent remaining term. Estimated dividend yield is based upon historical dividends paid by the Company.

8

     The following table summarizes stock option activity for the three months ended April 2, 2006:

     The aggregate intrinsic value above is before applicable income taxes, based on the Company's closing stock price of $58.41 as of the last business day of the period ended April 2, 2006 had all options been exercised on that date. The weighted intrinsic value of the options exercised during the first quarter was $20.75. As of April 2, 2006, total unrecognized stock-based compensation expense related to nonvested stock options was approximately $4.6 million, which is expected to be recognized over a weighted average period of approximately three years.

     The Company issues new shares of common stock upon the exercise of stock options.

     Nonvested stock option activity for the three months ended April 2, 2006 is as follows:

     The following table summarizes additional information concerning options outstanding at April 2, 2006:

     The Company has granted certain corporate officers rights to receive shares of the Company's common stock under the Company's 2001 Stock Award and Incentive Plan (the 2001 Plan). The rights will be deferred for a specified number of years of service, subject to restrictions on transfer and other conditions. Upon issuance of the

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rights, a deferred compensation expense equivalent to the market value of the underlying shares on the date of the grant was charged to stockholders' equity and was being amortized over the estimated average deferral period of approximately five years. Under the provisions of Statement No. 123R, the recognition of unearned compensation is no longer required. Accordingly, in the first quarter of 2006, the balance of Deferred Equity Compensation was reversed into Additional Paid-in Capital on the Company's balance sheet. The Company granted 44,400 shares in the first quarter of 2006 and 34,100 shares were granted in the first quarter of 2005. The fair value was determined based on the market value of unrestricted shares. The discount for the restriction was not significant.  As of April 2, 2006, there was unrecognized stock-based compensation related to restricted stock of $5.4 million which will be recognized over approximately the next four years. The compensation expense amortized with respect to all units was approximately $0.3 million and $0.2 million for the quarters ended April 2, 2006 and April 3, 2005, respectively, and is included in marketing and administrative expenses. No restricted stock awards were vested as of April 2, 2006.

     The following table summarizes the restricted stock activity for the Plan:

     Basic earnings per share are based upon the weighted average number of common shares outstanding during the period. Diluted earnings per share are based upon the weighted average number of common shares outstanding during the period assuming the issuance of common shares for all dilutive potential common shares outstanding. The following table sets forth the computation of basic and diluted earnings per share:

10

     The weighted average diluted common shares outstanding for the three months ended April 2, 2006 and April 3, 2005 excludes the dilutive effect of 58,200 options and 3,000 options, respectively, as such options had an exercise price in excess of the average market value of the Company's common stock during such period.

     The weighted average diluted common shares outstanding for the three months ended April 2, 2006 includes the dilutive effect of average unearned compensation as required under SFAS No. 123R.

     The following is a summary of inventories by major category:

     The Company accounts for goodwill and other intangible assets in accordance with SFAS No. 142, "Goodwill and Other Intangible Assets." Under SFAS No. 142, goodwill and other intangible assets with indefinite lives are not amortized, but instead are tested for impairment at least annually in accordance with the provisions of SFAS No. 142.

     The carrying amount of goodwill was $53.8 million and $53.6 million as of April 2, 2006 and December 31, 2005, respectively. The net change in goodwill since January 1, 2006 was primarily due to the effect of foreign exchange.

     Acquired intangible assets subject to amortization as of April 2, 2006 and December 31, 2005 were as follows:

     The weighted average amortization period for acquired intangible assets subject to amortization is approximately 15 years. Estimated amortization expense is $0.6 million for each of the next five years through 2010.

     Included in other assets and deferred charges is an intangible asset of approximately $8.6 million which represents the non-current unamortized amount paid to a customer in connection with contract extensions at eight PCC satellite facilities. In addition, a current portion of $1.8 million is included in prepaid expenses and other current assets. Such amounts will be amortized as a reduction of sales over the remaining lives of the customer contracts. Approximately $0.5 million was amortized in the first quarter of 2006. Estimated amortization as a reduction of sales is as follows: remainder of 2006 - $1.3 million; 2007 - $1.8 million; 2008 - $1.8 million; 2009 - $1.5 million; 2010 - $1.2 million; with smaller reductions thereafter over the remaining lives of the contracts.

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MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
(Unaudited)

     The Company accounts for impairment of long-lived assets in accordance with SFAS No. 144, "Accounting for the Impairment or Disposal of Long-Lived Assets." SFAS No. 144 establishes a uniform accounting model for long-lived assets to be disposed of. Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. If events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable, the Company estimates the undiscounted future cash flows (excluding interest), resulting from the use of the asset and its ultimate disposition. If the sum of the undiscounted cash flows (excluding interest) is less than the carrying value, the Company recognizes an impairment loss, measured as the amount by which the carrying value exceeds the fair value of the asset, determined principally using discounted cash flows. There was no charge for impairment during the first quarter of 2006.

     Effective January 1, 2006, the Company adopted the consensus of Emerging Issues Task Force ("EITF") Issue No. 04-06, "Accounting for Stripping Costs Incurred During Production in the Mining Industry." This consensus states that stripping costs incurred during the production phase of a mine are variable production costs that should be included in the costs of inventory produced during the period that the stripping costs are incurred. The Company had previously deferred stripping costs in excess of the average life of mine stripping ratio and amortized such costs on a unit of production method when the ratio of waste to ore mined is less than the average life of mine stripping ratio. As a result, the Company recorded an after-tax charge of $ 7.1 million to its opening retained earnings and increased its opening inventory by $0.8 million. The following is a reconciliation of our opening retained earnings:

     The change did not have a significant impact on the first quarter 2006 earnings.

     The following is a summary of long-term debt:

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MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
(Unaudited)

     As of April 2, 2006, the Company had $158 million of uncommitted short-term bank credit lines, of which approximately $43 million was in use.

     We have $50 million in Guaranteed Senior Notes due on July 24, 2006, which we expect to refinance, in whole or in part, through a combination of bank loans and/or private placements. Such amount is included in current maturities of long-term debt.

     The Company and its subsidiaries have pension plans covering substantially all eligible employees on a contributory or non-contributory basis.

     The Company expects to contribute $8 million to its pension plan and $3 million to its other post retirement benefit plans in 2006. As of April 2, 2006, $3.5 million has been contributed to the pension fund and approximately $0.7 million has been contributed to the post retirement benefit plans.

     The following are the components of comprehensive income:

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MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
(Unaudited)

     The components of accumulated other comprehensive loss, net of related tax, are as follows:

     SFAS No. 143, "Accounting for Asset Retirement Obligations" establishes the financial accounting and reporting obligations associated with the retirement of long-lived assets and the associated asset retirement costs. The Company has asset retirement obligations related to its PCC satellite facilities and its mining properties, both within the Specialty Minerals Segment. This statement requires that the fair value of a liability for an asset retirement obligation be recognized in the period in which it is incurred if a reasonable estimate of fair value can be made. The associated asset retirement costs are capitalized as part of the carrying amount of the long-lived asset.

     The following is a reconciliation of asset retirement obligations as of April 2, 2006:

     Approximately $0.5 million is included in other current liabilities and $10.7 million is included in other non-current liabilities in the Condensed Consolidated Balance Sheet as of April 2, 2006.

     Under the terms of certain agreements entered into in connection with the Company's initial public offering in 1992, Pfizer Inc ("Pfizer") agreed to indemnify the Company against any liability arising from claims for remediation, as defined in the agreements, of on-site environmental conditions relating to activities prior to the closing of the initial public offerings. The Company had asserted to Pfizer a number of indemnification claims pursuant to those agreements during the ten-year period following the closing of the initial public offering. Since the initial public offering, the Company has incurred and expensed approximately $6 million of environmental claims under these agreements. On January 20, 2006, Pfizer and the Company agreed to settle those claims, along with certain other potential environmental liabilities of Pfizer, in consideration of a payment by Pfizer of $4.5 million. Such payment was recorded as additional paid-in-capital, net of its related tax effect.

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MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
(Unaudited)

     During the first quarter of 2006, the Company recognized an insurance settlement gain of $1.8 million, net of related deductible, for property damage sustained at one of our facilities in 2004 as a result of Hurricane Ivan. Claims submitted to the insurance carrier for damages related to a combination of replacement costs for fixed assets and reimbursement of expenses associated with the clean-up and repairs at the facility. The insurance settlement gain related to the reimbursement of replacement costs for fixed assets in excess of the net book value of such assets.

     Segment information for the three months ended April 2, 2006 was as follows:

     The carrying amount of goodwill by reportable segment as of April 2, 2006 and December 31, 2005 was as follows:

     A reconciliation of the totals reported for the operating segments to the applicable line items in the condensed consolidated financial statements is as follows:

     The Company's sales by product category are as follows:

The Board of Directors and Shareholders
Minerals Technologies Inc.:

     We have reviewed the condensed consolidated balance sheet of Minerals Technologies Inc. and subsidiary companies as of April 2, 2006 and the related condensed consolidated statements of income and cash flows for the three-month periods ended April 2, 2006 and April 3, 2005. These condensed consolidated financial statements are the responsibility of the company's management.

     We conducted our review in accordance with the standards of the Public Company Accounting Oversight Board (United States). A review of interim financial information consists principally of applying analytical procedures to financial data and making inquiries of persons responsible for financial and accounting matters. It is substantially less in scope than an audit conducted in accordance with the standards of the Public Company Accounting Oversight Board (United States), the objective of which is the expression of an opinion regarding the financial statements taken as a whole. Accordingly, we do not express such an opinion.

     Based on our review, we are not aware of any material modifications that should be made to the condensed consolidated financial statements referred to above for them to be in conformity with U.S. generally accepted accounting principles.

     We have previously audited, in accordance with standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheet of Minerals Technologies Inc. and subsidiary companies as of December 31, 2005, and the related consolidated statements of income, shareholders' equity, and cash flows for the year then ended (not presented herein); and in our report dated March 2, 2006, we expressed an unqualified opinion on those consolidated financial statements. In our opinion, the information set forth in the accompanying condensed consolidated balance sheet as of December 31, 2005 is fairly stated, in all material respects, in relation to the consolidated balance sheet from which it has been derived.

     As discussed in the Notes to Condensed Consolidated Financial Statements, effective January 1, 2006, the Company adopted Statement of Financial Accounting Standards ("SFAS") No. 123R, "Shared-Based Payment," SFAS No. 151, "Inventory Costs - an Amendment of ARB No. 43, Chapter 4," and Emerging Issues Task Force Issue No. 04-06, "Accounting for Stripping Costs Incurred During Production in the Mining Industry."

KPMG LLP

New York, New York
May 4, 2006

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    In the first quarter of 2006 net sales grew 6% over the prior year from $250.8 million to $266.0 million. Foreign exchange had an unfavorable impact on sales of approximately 2 percentage points of growth. Operating income decreased 21% to $19.0 million from $24.1 million in the prior year. Net income decreased 16% to $12.8 million from $15.2 million in 2005.

     The comparison of our operating income and net income in the first quarter has been affected by a number of factors:

      We face some significant risks and challenges in the future:

     Despite these risks and challenges, we are optimistic about the opportunities for continued growth that are open to us, including:

     However, there can be no assurance that we will achieve success in implementing any one or more of these opportunities.

     On July 19, 2005, the Company's largest customer, International Paper Company, announced a general plan to restructure certain elements of its businesses. There has been no further release of public information related to this plan that has an immediate impact on our Paper PCC product line and assets.

     On March 21, 2006, we ceased operation of a one-unit satellite PCC facility in Park Falls, Wisconsin, after the paper company shut down its mill and filed for bankruptcy protection. The Company recorded a provision for bad debt of approximately $1 million in the first quarter of 2006 in connection with this bankruptcy. The paper company is presently seeking a buyer for its mill and, if successful, the Company believes it would continue to supply PCC from its satellite facility. If the Company does not resume production from its satellite facility, we could incur an impairment charge of approximately $0.6 million.