Realistic black and white tattoo design for the back of a hand. The tattoo shows a human mouth completely closed by a zipper, rendered in hyper-realistic grayscale. The zipper’s slider and pull tab are smaller in proportion, about one-third the width of the mouth, and the pull tab hangs downward naturally. The zipper is fully closed, reaching all the way to the right corner of the lips, with no extra visible closed section beyond it. Maintain the fine detail of the lips (subtle labial texture) and the soft shading that blends into the skin of the hand and background. Lighting and shading should emphasize realism, skin texture, and depth, without adding color—only grayscale tones. See more