Michigan State University Extension
Preserving Food Safely - 01600507
Pack food and syrup cold into containers. Having materials decrease freezing time and helps retain natural color, flavor and texture of food.
When food is packed in bags, press air out of the unfilled part of the bag. Press firmly to prevent air from getting back in. Seal immediately.
Allow ample headspace. With only a few exceptions, allowance for headspace is needed between packed food and closure because food expands as it freezes. Follow directions given in the recipe for appropriate amount of headspace needed for a given fruit or vegetable.
Keep sealing edges free from moisture or food so that a good closure can be made. Seal carefully.
Label packages plainly. Include name of food, date it was packed, and type of pack if food is packed in more than one form.