Answer :
In H. G. Wells' novel, Griffin, the Invisible Man, uses black ink to darken his skin and make himself visible temporarily, adding to the suspense of the story.
In H. G. Wells' novel, The Invisible Man, the character known as Griffin, who is a scientist, develops a method to become invisible. To darken his skin and make himself visible, Griffin uses a process called dyeing. He specifically uses a kind of black ink to darken his skin. This is a temporary measure, intended to make him visible to others, however it's also easily washed away, thus allowing him to become invisible again when he chooses. This detail adds to the suspense and intrigue of the story, as Griffin battles both his invisibility and the consequences of his scientific ambition.
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