Proofs of a full - colour advertisement printed in one colour at a time are called: (A) monochrome proofs (B) single colour proofs (C) progressive proofs (D) testing proofs Correct Ans: (C) Explanation:Progressive proofs refer to the prints of a full-color advertisement where the printer prints one color at a time. This method allows the printer to check each individual color's quality and alignment before combining them. By printing each color separately, it ensures that the final advertisement will match the desired color scheme once all inks are applied together. Monochrome proofs, single color proofs, and testing proofs are different types of prints, but they do not involve printing one color at a time. Monochrome proofs use a single color, while single color proofs print only one color without the sequential layering process of progressive printing. Testing proofs serve as preliminary checks to assess accuracy but don’t specifically focus on the color sequencing. In short, progressive proofs describe the process of printing each color separately to ensure accuracy in the final print.