In the aftermath of World War II – when poster design was deemed the “Princess of Graphic Art” – Paul Kor geared his career towards creating posters for advertising firms. By 1949 his designs were plastered across billboards throughout the whole of Israel. But it was not until 1952, after winning a prize for a poster he created in honor of Israel's second Independence Day, that his career really began to soar. He started reigning in commissions to design posters for major governmental organizations and some of the most widely recognized, international companies.

Every time Kor received an order, he would pace from room to room, muttering, "I need an idea, I need an idea." He would absolutely refuse to eat or drink until an innovative concept finally emerged. While working on a consumer product-oriented poster,

he aimed to create an image that instantly communicated the product’s core purpose. For the posters he designed for the State of Israel, however, he would try to integrate more ideological elements that reflected his allegiance to Israel.

No matter the project, his creations always showcased a great deal of color and humor as well as many of the stylistic and fashion trends of a particular time period. Having studied under the guidance of French poster artist Paul Colin, he was also familiar with a variety of different techniques for making his work powerful, eye-catching and in some cases, linguistically diverse. As a polyglot, he was able to creatively incorporate languages such as English, French, Swiss-German and Hebrew.