Type 1 is a very fair skin type. It may also be referred to as ivory. People with type 1 skin type will get sunburnt much more easily than anyone else. They get burnt even with very little sun exposure because their skin is highly sensitive. Also, people with type 1 skin type will not tan. Usually, people who fall under this category have pale white skin, green or blue eyes, and blond or red hair.
To give you a clearer picture, celebrities with type 1 skin type are Nicole Kidman, Emma Stone, Cate Blanchett, Anne Hathaway, Prince Harry, and Ed Sheeran. Source: Skincaregeeks.com