An aluminum automatic open windproof three-fold umbrella with a printed pattern is a type of umbrella designed to provide protection from rain and wind. Here are some common characteristics of such an umbrella:

1. Material: The umbrella frame and ribs are typically made from lightweight and durable aluminum. This material offers strength and resistance to rust and corrosion.

2. Automatic Open: The umbrella is designed with an automatic open mechanism, allowing for quick and effortless opening with the push of a button. This feature provides convenience and ease of use.

3. Windproof Design: The umbrella is specifically designed to withstand wind gusts and prevent the umbrella from turning inside out. It may have a reinforced frame, flexible ribs, or a vented canopy that allows wind to pass through.
   

4. Three-Fold Design: The umbrella has a three-fold design, which means it can be compactly folded into three sections for easy storage and portability. This makes it convenient to carry in a bag or purse when not in use.

5. Printed Pattern: The umbrella features a printed pattern on its canopy, adding a decorative and stylish element. The pattern can vary widely, including floral designs, geometric shapes, logos, or other artistic motifs.

6. Canopy Material: The canopy is typically made from a waterproof and durable material such as polyester or nylon. It should provide reliable protection against rain and be quick-drying to prevent moisture retention.

7. Handle: The umbrella is equipped with a handle for gripping and controlling the umbrella. The handle is often made from a comfortable and non-slip material such as rubber or plastic.

8. Size: The umbrella comes in various sizes, with the canopy diameter typically ranging from 30 to 40 inches when open. The size should provide adequate coverage for an individual during rainy weather.

9. Lightweight: The aluminum construction and three-fold design contribute to the umbrella's lightweight nature, making it easy to carry and hold for extended periods without causing discomfort.

10. Durability: The umbrella is designed to be durable and long-lasting, with sturdy construction and quality materials that can withstand regular use and exposure to various weather conditions.