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  2. Lead-glazed earthenware - Wikipedia

    en.wikipedia.org/wiki/Lead-glazed_earthenware

    The French 16th-century Saint-Porchaire ware is lead-glazed earthenware; an early European attempt at rivalling Chinese porcelains, it does not properly qualify as faience, which is a refined tin-glazed earthenware. In 16th-century France Bernard Palissy refined lead-glazed earthenware [6] to a high standard.

  3. Conservation and restoration of ceramic objects - Wikipedia

    en.wikipedia.org/wiki/Conservation_and...

    [contradictory] This type of clay is water-soluble and unstable. Earthenware is clay that has been fired between 1000–1200°C or 1832°–2192°F. The firing makes the clay water insoluble but does not allow the formation of an extensive glassy or vitreous within the body. Although water-insoluble, the porous body of earthenware allows water ...

  4. Ceramic glaze - Wikipedia

    en.wikipedia.org/wiki/Ceramic_glaze

    Ceramic industries are reluctant to use lead alternatives since leaded glazes provide products with a brilliant shine and smooth surface. The United States Environmental Protection Agency has experimented with a dual glaze, barium alternative to lead, but they were unsuccessful in achieving the same optical effect as leaded glazes. [citation ...

  5. Lead glass - Wikipedia

    en.wikipedia.org/wiki/Lead_glass

    Cut glass wine glass made of lead glass. Lead glass, commonly called crystal, is a variety of glass in which lead replaces the calcium content of a typical potash glass. [1] Lead glass contains typically 18–40% (by mass) lead(II) oxide (PbO), while modern lead crystal, historically also known as flint glass due to the original silica source, contains a minimum of 24% PbO. [2]

  6. High levels of lead found in 12 cinnamon brands. List to avoid.

    www.aol.com/consumer-reports-high-lead-levels...

    Consumer Reports found troubling levels of lead in one-third of ground cinnamon and cinnamon-containing spice blends it tested, according to the findings released Thursday. The tests involved ...

  7. The FDA Set Guidelines for 'Acceptable' Levels of Lead in ...

    www.aol.com/fda-set-guidelines-acceptable-levels...

    The FDA importantly noted that the levels are not "zero" because lead and other contaminants can naturally occur in the air, water, and soil, which produces the fruits, vegetables, and grains used ...

  8. High Lead Levels Found in 12 Brands of Cinnamon, Report Finds

    www.aol.com/high-lead-levels-found-12-180148438.html

    Here's a list of the 12 brands with the highest lead levels. Paras Cinnamon Powder: 3.52 PPM of lead. EGN Cinnamon Powder: 2.91 PPM of lead. Mimi's Products Ground Cinnamon: 2.03 PPM of lead.

  9. Green glazed pottery of Atzompa - Wikipedia

    en.wikipedia.org/wiki/Green_glazed_pottery_of...

    Studies have shown that people in potters’ communities such as Atompa, where lead glaze is used have unusually high levels of the substance in their blood. The exposure comes not only from the making of the pottery, but the use of it to simmer sauces and stews. With time and repeated use, the lead leaches from the glaze into the food.

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