It depends; there are two types of film that might develop, and neither necessarily mean that the olives have spoiled.
A clear film on top of the brine is a layer of Olive Oil that has solidified due to changes in temperature. Simply remove the jar from the refrigerator for 30 minutes and the olive oil will dissolve and return to its liquid state. A little "olive jar shake" won't hurt either.
A white film however, is the result of a reaction (oxidation) that occurs between the vinegar and the air in the jar. Simply remove the layer of white film with a spoon. Then remove and rinse any olives that may have come in contact with the film. The olives are most always safe for consumption and may be placed back in the brine.
Canned olives are packed in brine. That is simply salt water.
a glyceride
I would say it's probably more of an esthetic thing. Black olives wouldn't look appetizing in a jar with all the black liquid in it.Many green olives are either naturally fermented or acidified and do not require a metal can. Most black olives are a low-acid food and require a higher heat canning process - which is more easily accomplished in a metal can.
Save as much of the liquid as you can from the original container, then store in the refrigerator in an airtight container. My leftover olives are usually eaten within a week, but I know for sure they'll last that long in the fridge.
The usual prison fare of cheese, bread, olives, and tea, along with a half bottle of wine
olives
A type of 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
· kalamata olives
olives hav no cholestrol
olives vertes