FOOD TECHNOLOGY

Detailed explanation-1: -Headspace is the space in the jar between the inside of the lid and the top of the food or its liquid. Headspace will vary from ¼-inch for jams and jelly, ½-inch for tomatoes, to 1 to 1¼-inches for meat and poultry. Always follow recipe guidelines. Occasionally use a ruler to check the accuracy of the headspace.

Detailed explanation-2: -Headspace is the distance between the surface of food and the underside of the lid. Leaving the specified amount of headspace in a jar is important to assure a vacuum seal. If too little headspace is allowed the food may expand and bubble out when air is being forced out from under the lid during processing.

Detailed explanation-3: -If too much headspace is allowed, the food at the top is likely to discolor. Also, the jar may not seal properly because there will not be enough processing time to drive all air out of the jar.

Detailed explanation-4: -Did you know that the empty space at the top is technically known as headspace? Not all preserves require headspace, this depends on the type of packaging you use and its lid. There are many types of containers on the market, made of different materials and with different closures. For example: Glass vessels.