They help balance acidity in tomato sauces and salad dressings. Certain sugars are important in foods. Invert sugar helps keep sucrose from crystallizing in candies and corn syrups used in some foods because it is less sweet than sucrose. One of its roles is to sweeten fruit, cereals, tea, and coffee. It serves as the basic constituent in the manufacture of candies, icings, and ice cream.
Sugar is useful in curing meats, leather, and tobacco.
It is often introduced in the form of a food additive. When it is boiled with water to a syrupy consistency, it serves as a preservative for jams, jellies, and for fruits. When light impinges on the surface of a material at an angle to the normal to the surface, its direction is changed upon passing into the surface. Every substance or material has a point at which light breaks upon passing into the material. The most common type of refractometer is the Abbe' Refractometer.