Potassium dichromate is a chemical compound that has historically been used in ceramics to produce vibrant colors, especially bright shades of orange and yellow, in glazes and engobes. This compound is known for its ability to react at high temperatures, resulting in intense, highly saturated colors.
Potassium dichromate is particularly valuable in ceramic glazes where a wide range of warm shades are sought, from golden yellows to intense oranges, which are difficult to obtain with other compounds. Its reactivity at high temperatures allows the color to be more stable during the firing process, which facilitates control and predictability of the results.
However, the use of potassium dichromate has decreased significantly in modern ceramics due to its toxicity. The compound contains hexavalent chromium, which is a highly toxic and carcinogenic agent. This has led to increased awareness of its handling and has prompted the search for safer alternatives, especially in food-grade ceramics and in parts that come into contact with the skin.
Interesting Fact
Despite its effectiveness as a colorant, potassium dichromate is a hazardous substance and its use in ceramics is highly regulated due to its toxic effects and environmental impact. Many ceramists have sought safer alternatives to obtain similar colors.
Helpful Tip
If you decide to use potassium dichromate, be sure to follow all safety precautions, including the use of personal protective equipment and proper waste disposal. It is always advisable to look for less toxic alternatives when possible.
