1 Brands: Tums, Caltrate, and most other brands.  Absorption: Calcium carbonate is alkaline based. It requires extra stomach acid for better absorption, so it is best taken right after meals or with a glass of acidic juice such as orange juice.
Tempered glass is one of two kinds of safety glass regularly used in applications in which standard glass could pose a potential danger. Tempered glass is four to five times stronger than standard glass and does not break into sharp shards when it fails. Tempered glass is manufactured through a process of extreme heating and rapid cooling, making it harder than normal glass.
Tempered Glass Requirements*. * As of November 2010 âAs Requirements May Change, Check Building Codes for Any Updates. Tempered Glass can be used in any window, but it is required by code in specific situations. When replacing. windows, the following is a simple description of the most common conditions which require tempering. 1. Any Window or sidelight within 24 inches horizontally of a door must be tempered. 2. Any Window or Sash that is 9 square feet or more AND is 18 inches or less from a floor must be tempered. 3. Any Window within a Tub or Shower area that is less than 60 inches from the floor of the tub must be tempered. 4. Any Window on a Staircase Landing or within 60 inches a staircase tread must be tempered. Additionally, Custom Windows automatically tempers any window with 40 square feet or more of glass for safety and strength.