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Significance and Use
5.1 This test is for evaluating ceramic products that are intended for reheating in a Consumer based microwave oven. It is not intended for evaluating products that will be used in commercial type microwaves.
5.2 This test method is not intended to evaluate metallic or polymeric based products.
5.3 Ceramic products intended for microwave use must also be evaluated for thermal shock resistance and pass the 325°F criteria as described in Test Method , before being tested for microwave safety. This would include specific tests for dinnerware, cookware, drinkware and ancillary items intended for use with hot foods, such as gravy boats or any product intended for microwave use.
5.4 Dishes having a metallic glaze, decoration or paint should not be used in this test or microwave ovens unless it is specifically designed for and marked as microwave safe.
1.1 This test method determines the suitability of ceramicware for use in microwave re-heating applications. Microwave ovens are mainly used for reheating and defrosting frozen foods. Severe thermal conditions can occur while reheating foods. Typical reheating of foods requires one to five min. in the microwave at the highest power settings. Longer periods than five minutes are considered cooking. Cooking test methods and standards are not addressed in this test method. Most ceramicware is minimally absorbing of the microwave energy and will not heat up significantly. Unfortunately there are some products that absorb microwave energy to a greater extent and can become very hot in the microwave and pose a serious hazard. Additionally, the nature of microwave heating introduces radiation in a non-uniform manner producing temperature differentials in the food being cooked as well as the ceramic container holding it. The differential may become great enough to thermal shock the ware and create dangerous conditions.
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C554 Test Method for Crazing Resistance of Fired Glazed Ceramic Whitewares by a Thermal Shock Method
ICS Number Code 97.040.60 (Cookware, cutlery and flatware)
UNSPSC Code 52121600(Table and kitchen linen and accessories)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM C1607-12(2016), Standard Test Method for Determination of “Microwave Safe for Reheating” for Ceramicware, ASTM International, West Conshohocken, PA, 2016, www.astm.orgBack to Top