A-A-53348
15 February 1988
COMMERCIAL ITEM DESCRIPTION
PLASTER, DENTAL, (Modeling)
The General Services Administration has authorized the use of this Commercial Item Description in preference to Federal Specifications-P-446D.
This commercial item description covers plaster of paris suitable for making dental models. The plaster shall be furnished in the following nominal sizes, as specified:
Size 1 – 35 pounds
Size 2 – 4 pounds
Salient Characteristics:
The plaster shall be suitable for accurately reproducing the recorded dental details of a negative impression.
Composition and physical properties. The plaster shall comply with the requirements of American Dental Association (ADA) Specification No. 25 (Dental Gypsum Products) for composition and physical properties of Type II, model plaster. Test procedures for setting time, fineness, setting expansion, compressive strength, testing consistency, and reproduction of detail shall be a as specified in ADA Specification No. 25.
Net weight. The net weight of the plaster shall be a minimum of 35 pounds for size 1 and 3 1/2 pounds for size 2, when tested using a suitable balance or scale.
Delivery schedule. Not more than 3 months shall have elapsed from the date of manufacture of the plaster to the date of delivery to the Government.
Instructions. Information 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, plaster should be mixed thoroughly before dispensing. In addition, two copies of the instructions shall be forwarded to the contracting officer for information purposes.
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.
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