Food additives can be categorized into several groups, including preservatives, flavor enhancers, colorings, and stabilizers. Preservatives, such as sodium benzoate and sulfur dioxide, are used to inhibit the growth of harmful bacteria, molds, and yeasts, thereby prolonging the shelf life of perishable products. This is particularly important in a global market where food is transported over long distances and needs to remain safe and consumable for extended periods.
Glazing agents are substances applied to create a smooth, glass-like surface on products. They can be either organic or inorganic compounds and are often used in conjunction with other materials to improve the overall characteristics of the final product. For instance, in the ceramics industry, glazing agents not only provide a visually appealing surface finish but also serve functional purposes such as making the items more impermeable and durable. Common chemicals used as glazing agents include silica, feldspar, and kaolin, all of which contribute to the formation of a glassy surface when fired in a kiln.