There are thousands of ink formulations that are around. A person can work with a company that will help a person find a food grade ink. They can help develop new fluids that can be printed directly on the food or on packaging for the food. There are a number of things that a person can use including the ink that is safe to be etched right on the food.
There are a number of products that can be printed right on the food. This ink will dry quickly and is free from odor. It can be printed directly on the food. These inks come in a number of colors and can be used for purposes such as printing on the freshness date on the eggs, stamping meat, and can be used to tell if breads and baked goods are fresh or not.
There are a number of inks that can be used on flexible plastics and a number of other firm containers. They can be printed on bags, cups, trays, and other films. They are made to be fast drying, abrasion resistant, and will remain legible when if the package is moved. They can be printed on these packages from thermal transfer printers, and are great for companies that produce packages in high volumes.
There are also a number of ink that can be printed on aluminum and tin cans such as tuna and canned vegetables. There are different thermochromic inks that can be used. The color may change on the can when it is sterilized but it can still be easy to read.
These are just some of the inks that can be used for foods. They can help consumers know when the food is good until so they can be safe.