DOD A-A-53389-1988 STONE ARTIFICIAL DENTAL《牙齿人造石头》.pdf
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1、A-A-53389 b5 E 977797Li 0030Li7Li 2 li c-90 -31 A-A-53 3 8 9 14 March 1988 COMMERCIAL ITEM DESCRIPTION STONE, ARTIFICIAL, DENTAL The General Services Administration has authorized the use of this Commercial Item Description as a replacement for Federal Specification U-S-746D. Salient Characteristics
2、: This commercial item description covers artificial dental stones suitable for making dental stone casts and dies. The stones shall be furnished in the following types and nominal sizes, as specified: Type I. - High strength stone Size 1. - 50 grams Size 2. - 4 1/2 pounds Size 3. - 35 pounds Type I
3、I. - Low strength stone Size 3. - 35 pounds Size 4. - 25 pounds Type I, high strength artificial stone powder, when mixed with water according to manufacturers instructions, shall be suitable for fabrication of master casts and dies. Type II, low strength artificial stone powder, when mixed with wat
4、er according to manufacturers instructions, shall be suitable for fabrication, flasking and mounting of diagnostic casts. Composition and physical properties. shall comply with American Dental Association (ADA), Specification No. 25 (Dental Gypsum Products) for composition and physical properties. T
5、ype III of ADA Specification No 25. High strength stone shall comply with Type IV of ADA Specification No. 25. procedures for setting time, fineness, setting expansion, compressive strength, reproduction of detail, and testing consistency shall be as specified in ADA Specification No. 25. Color. Hig
6、h strength stone powder shall be furnished in any pale, pastel shade of color, except buff or yellow. Low strength stone powder shall be furnished in a buff or light yellow color only. The artificial stone Low strength stone shall comply with Test / AMSC N/A THIS DOCUMENT CONTAINS & PAGES. FSC 6520
7、DISTRIBUTION STATEMENT A. Approved for - public release: distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-53389 bS U 4999374 O030475 Y m A-A-5 33 0 9 Net: weight. The stone powder shall be furnished in the weights sipect
8、iied below, when tested using a balance or scale suitable OK the purpose intended. Net Weight: of Stone. Type 1 Type II Size 1. 49-71 grams Size 3. 35-37 pounds Size 2. 4 112-5 pounds Size 4. 25-27 pounds Size 3. 35-37 pounds gertiication. Suppliers shall furnish at time of award a dated certificate
9、 and data showing that the dental stone they propose to lurnish is the same in quality and brand as that appearing on the list of certified materials for American Dental Association Specification No. 25 for dental gypsum products. Types I and 11 of this specification shall be certified for types IV
10、and III, respectively, of ADA specification No. 25. Compliance with this certification requirement does not absolve the contractor from complete compliance with the requirements of this specification. Delivery schedule. Not more than 3 months shall have elapsed from the date of manufacture of the st
11、one to the date of delivery to the Government. Instructions. Instructions shall be as required by ADA specification No. 25 and include a statement that heavy ingredients settle to the bottom, and that for consistently accurate casts, the stone should be mixed thoroughly before dispensing. In additio
12、n, two copies of the instiuctions shall be forwarded to the contracting officer for information purposes. Workmanshi& from its appearance or may impair its serviceability. - Unit, Package (PG). One package for size 1, Type I containing twenty-four moisture-resistant envelopes (50-70 grams of stone p
13、er envelope) of Type I stone, as specified, constitutes one unit. Each package shall contain instructions or use and description OP physical properties. - Unit. Can (CN). One can for size 3, Type I or Type II containing 35 pounds of stone packaged in a recloseable moisture resietant container, as sp
14、ecified, constitutes one unit. Each package shall contain detailed instructions for use. The stone shall be free from defects which detract 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1 I l l l I I I I I A-A-5338 9 Unit. Can (CN). One can for s
15、ize 2, Type I containing four and one-half pounds of stone packaged in a recloseable moisture package shall contain instructions for use. resistant container, as specified, constitutes one unit. Each Unit. Can (CN). One can for size 4, Type II containing 25 pounds of stone packaged in a recloseable
16、moisture resistant container, as specified, constitutes one unit. Each package shall contain detailed instructions for use. Quality Assurance Provisions. Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of
17、all inspection requirements as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserv
18、es the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. Records. Records of examinations and tests performed by or for the contractor shall be maintained by the contr
19、actor and made available to the Government, upon the Governments request, at any time, or from time to time, during the performance of the contract and for a period of three years after delivery of the supplies to which such records relate. Inspection. Inspection, as used herein, is defined as both
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