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Oven-and-Microwave-Safe Glass Bake Ware-Green Glass Dish
Kitchen
Cookware & Tableware
Nonmetal Cookware (Nonelectric) (461)
Anchor Hocking, LLC    
Anchor-Hocking
SM 1044 4-Quart Dish
 
 
Wal-Mart
Unspecified
5/30/2002 This date is an estimate
I baked some cornbread in an Anchor-Hocking Oven and Microwave Safe Glass Baking Dish and it exploded when I removed it from the oven. I received two black eyes and cuts to my face. It also burned my floor and counter top. I have doctor bills and pictures if needed.
4/19/2009
Mobile/Manufactured Home 
Injury→Injury, Seen by Medical Professional
Self
Female
47 years

Injury→Injury, No First Aid or Medical Attention Received
My friend / Neighbor / Co-worker
Male
53 years

Injury→Injury, First Aid Received by Non-Medical Professional
My friend / Neighbor / Co-worker
Male
27 years

Incident, No Injury
My friend / Neighbor / Co-worker
Male
28 years
No
No
No
Anchor-Hocking came to my residence
Yes
N/A
Comment from Anchor Hocking, LLC 10/24/2011
Anchor Hocking’s comments regarding Report No. 20111001-CC0C4-2147474775:

Anchor Hocking is proud that its products have been a safe and reliable part of American kitchens for generations. In fact, with annual production of glass bakeware in excess of 30 million pieces, Anchor Hocking has a failure rate of less than two-thousandths of one percent (0.002%) when taking all consumer concerns of any kind into consideration. Anchor Hocking is proud that it has never had any of its products recalled by the Consumer Product Safety Commission.

This report to the CPSC involved a green glass baking dish, manufactured by Anchor Hocking. The consumer reported that she had baked some cornbread in the dish, and it “exploded” when she removed it from the oven. Anchor Hocking was sorry to hear the consumer reported that there were injuries. The consumer previously contacted Anchor Hocking, but if she would like to contact Anchor Hocking’s Consumer Affairs Department again, it can be reached at consumer@anchorhocking.com or 1-800-562-7511, ext. 2478.

In this case, the consumer provided the glass baking dish to Anchor Hocking to perform an inspection as to the cause of the failure. In Anchor Hocking’s experience, consumer misuse, failure to follow the manufacturer’s instructions, and supplier mishandling are the causes of the overwhelming majority of glass product failures industry-wide. Examples of this type of mishandling are: hitting the glass on a counter or hard surface causing a chip to break off; using improper cleaning materials or utensils; using on a stovetop; placing a hot dish on a wet or cold surface; adding liquid to a hot dish; or using in a too-hot oven. As a result of the inspection in this case, Anchor Hocking believes that misuse such as stovetop use caused or contributed to the alleged failure of the product. Anchor Hocking found no manufacturing deviations in the product.

According to the consumer, the glass baking dish “exploded.” There is an explanation for this method of failure. Anchor Hocking’s glass bakeware is subjected to a manufacturing process known as tempering or heat strengthening. Tempering is designed to strengthen glass against thermal shock and in the event of a failure to cause the products to fail safely by shattering in many smaller pieces that are unlikely to cause serious injury. The consumer’s report of a product shattering into many small pieces is actually an indication the product failed as it is designed to with tempered glass.

To warn the consumer of this potential, the care and use instructions for the oven bakeware state the following warning: “Failure to follow these warnings may cause the product to suddenly fracture into many small pieces, which could result in property damage or serious personal injury from cuts or burns. Scratches from certain cleaning materials and utensils can weaken bakeware causing unexpected breakage when exposed to sudden temperature change.” The care and use instructions also state: “HEAT IN OVEN ONLY. Use your Anchor Hocking Bakeware in gas, electric or microwave ovens without browning element. Not for stovetop, broiler or toaster oven use.”

Tempered soda-lime-silicate is stronger and more durable, breaks into relatively small pieces generally lacking sharp edges and shards when it does break, and is a more environmentally-friendly product. Tempered or heat-strengthened bakeware is similar, although not identical, to tempering of other glass products where safety is a concern such as automobile windows, sliding glass doors, shower doors, etc. The priority is to eliminate a severe cutting hazard if a break occurs. The alternative form of glass bakeware is made with borosilicate, which is significantly weaker against mechanical breakage (i.e., dropping or hitting hard or sharp objects) and when it does break, it breaks into larger pieces of very sharp glass creating a significant risk of severe cuts, punctures, etc. Another failure mode is thermal shock, which results from a significant and immediate temperature change. Consistent scientific testing for decades has established that tempered soda-lime-silicate and borosilicate glass perform, at least, equivalent in thermal shock resistance. Indeed, Anchor’s testing, when the decision was made to change from borosilicate to tempered soda-lime-silicate in the 1980s, demonstrated a 40% improvement in thermal shock resistance for Anchor’s tempered soda-lime-silicate glass compared to annealed borosilicate silicate glass bakeware.

Glass bakeware is not without limitations. While it is a healthier alternative to metal bakeware because no hazardous materials leach into the food, and cooks often prefer it because it helps retain moisture, like all glass, it can break. Manufacturers of glass bakeware, including Anchor, have studied and evaluated the safety of glass bakeware while considering the rigors of cooking. Mechanical breakage (i.e., dropping or hitting hard or sharp objects) is the most frequent failure mode by a significant margin. Accordingly, making the bakeware stronger and more durable against mechanical breakage is a priority. Likewise, having the bakeware break in a safer manner—i.e., relatively small pieces generally lacking sharp edges and shards—is a priority. Tempered soda-lime-silicate glass achieves these goals.

Pursuant to 16 CFR § 1102.12(c)(3), Anchor Hocking verifies that it has reviewed the report of harm and the comment related to the report of harm and that the information contained in the comment is true and accurate to the best of Anchor Hocking’s knowledge, information, and belief. Pursuant to 16 CFR § 1102.12(c)(4), Anchor Hocking requests that the Commission publish the comment in the Database, and consents to the publication of the comment in the Database.

CPSC does not guarantee the accuracy, completeness, or adequacy of the contents of the Publicly Available Consumer Product Safety Information Database on SaferProducts.gov, particularly with respect to information submitted by people outside of CPSC.