The term "laid line" is typically used in reference to paper or fabric with visible guide lines that are created during production. Some antonyms for laid line would include words like unmarked, blank, featureless, and plain. These words connote a lack of visible lines or patterns on paper or fabric. Instead, unmarked paper or fabric has a smooth and even surface, while blank surfaces offer an absence of any marks or lines. Featureless and plain both evoke the idea of simplicity and lack of complexity, with no distinguishing marks to guide the eye. All in all, these antonyms provide a helpful shift in language to describe how different types of paper or fabric can look and feel.