More than likely, it is to help stabilize their color. UV exposure might turn them grey. Besides, they are unattractive to look at, especially since an iron solution is added to help stabilize the color. It is similar to why cherries are packed in cans of colored syrup.
Answer:
The process for making black olives results in the olives being packaged in a non sterile solution that may allow them to become contaminated with botulism. To prevent this from happening (it's bad for business to have your customers die), the olives are cooked in sealed containers. Glass jars cannot withstand the internal pressures generated by the cooking process and the olives must be cooked in metal cans.
Martinis contain green olives.
Green olives are a little unripe, but still ready to eat. Black olives are the same olives, but much riper. Green olives turn black as they mature.
olives vertes
In most cases, yes for black olives. However, green olives are packed in a brine that is heavy with salt, so, no for green olives.
No, a green olive is not a vegetable. All olives are considered to be a fruit. The olives are made to be green during processing. Green olives can be eaten alone or in various recipes.
You can add black olives to your salad if you'd like, but a common green salad does not usually have them.
Arbequina are mild Spanish olives, smoky flavor.
Black olives are actually green olives that are ripe. There are many types of olives and many of them are already dark in color. But the basic green olive (neé spanish olive or manzinilla olive) ripen over time into black olives ;)
Olives
Spanish green olives
300mg
Quite simply, fresh green manzanilla olives from Sevilla, Spain.