Resist techniques are methods used in ink drawing to create contrast and texture by preventing ink from adhering to certain areas of the paper or surface. These techniques often involve applying a resist substance, such as wax or masking fluid, which can later be removed to reveal the untouched area beneath, allowing for dynamic compositions and highlights in ink work. This approach enhances the overall depth and complexity of the artwork by creating a visual interplay between the areas of ink and those left untouched.