Once opened, gesso can last for several years if stored properly in a cool, dry place with the lid tightly sealed. However, over time, gesso may thicken or develop a skin on the surface. To extend its shelf life, you can add a small amount of water and mix well to restore its original consistency. It's always a good idea to perform a patch test before using older gesso to ensure it still provides the desired results. **

Once opened, gesso is generally durable for several years if stored properly in a sealed container and kept away from extreme temperatures. However, its durability can vary depending on the quality of the gesso and how it is stored. It is important to check for any signs of deterioration, such as a change in texture or odor, before using gesso that has been opened for an extended period of time. **

New York is considered a global city due to its significant influence in various fields such as finance, media, fashion, art, and culture. It is home to the United Nations headquarters, making it a major center for international diplomacy and politics. The city's diverse population, world-class universities, and vibrant economy attract people from all over the world, contributing to its status as a global hub for innovation and opportunity. Additionally, New York's iconic landmarks, Broadway shows, and renowned museums make it a popular destination for tourists and a cultural capital on the global stage. **

New York is considered a global city because it is a major center for finance, culture, media, art, fashion, research, technology, and entertainment. It is home to the United Nations headquarters and hosts a diverse population from around the world. New York City is a hub for international business and trade, with a strong presence of multinational corporations and a bustling stock exchange. Its iconic landmarks, such as the Statue of Liberty and Times Square, attract millions of tourists annually, further solidifying its status as a global city. **

New York is a truly global city, known for its diverse population, vibrant culture, and status as a major financial and business hub. It is a melting pot of different cultures, languages, and traditions, making it a truly cosmopolitan city. With its iconic skyline, world-renowned institutions, and influence in various industries, New York is a leading global city that attracts people from all over the world. Its impact on finance, media, fashion, and the arts further solidifies its status as a global city. **

Without gesso or a basic primer, the oil paint will not adhere properly to the surface of the canvas. This can result in the paint not spreading evenly, appearing dull, or flaking off over time. Gesso or a basic primer is essential as it creates a smooth and absorbent surface for the oil paint to adhere to, allowing for better color vibrancy and longevity of the artwork. **

New York is referred to as a global city because it is a major center for international finance, culture, media, fashion, art, research, technology, education, and entertainment. It is home to the United Nations headquarters and is a hub for international diplomacy. Additionally, New York City is one of the most diverse cities in the world, with a large immigrant population and a wide range of languages and cultures represented. The city's influence extends far beyond its borders, making it a key player on the global stage. **

New York City plays a significant role as a global city in various aspects. It is a major center for finance, commerce, media, art, fashion, research, technology, and entertainment, making it a hub for global business and cultural exchange. The city is home to the United Nations headquarters, further solidifying its status as a global diplomatic and political center. Additionally, New York's diverse population and status as a major immigration gateway contribute to its global influence, as it serves as a melting pot of different cultures and perspectives. Overall, New York City's economic, cultural, and political significance solidify its role as a key player in the global landscape. **