While keeping it sealed protects from evaporation and contamination, It doesn't protect it from things like gravity or chemical changes. Over time the ink will thicken, harden, or coagulate naturally, even without exposure to the air. The expiration date on it isn't there just as a marketing ploy after all. It's a prediction of when these things are expected to occur.
Features such as induction, halogen, sealed burners, solid black glass and ceramic cooktops, and downdraft and radiant heating techniques were also introduced during the 1990s. The new technologies made ovens "selfcleaning," more fuel and energy efficient
decade-1990s
The internet was a major technological development in the 1990s
The internet was a major technological development in the 1990s
The economy boomed in Ireland in the 1990s.
During the 1990s the stock market boomed.
Sales of spaghetti sauces were $2 billion in the 1990s
Juvenile footwear sales slowed in the early 1990s
.32 Rimfire ammunition has been out of production in the US since about 1972. Navy Arms has a small lot made in Brazil and imported into the US in the late 1990s. It is generally an obsolete cartridge, not available, other than as a collector's item, not intended to be shot.
About 55% of teenagers read books in the 1990s in the United States.
the development in the late 1990s of lenses that treat colorblindness.
How has power changed hands in Afghanistan since the 1990s?