Retouching black 'paint'?

My copy of Goethe is flaking bad... I've used jet black ink previously, but it doesn't quite get the same texture of the original. It seems to be something with a touch of acrylic or rubber, but I am not sure what would match best? Any one had any luck?

>1 artlessdodgerSB: buy a new copy. EV are cheap books and it’s not worth repairing them. I myself wouldn’t even bother as any rubbing or flaking just adds character and shows the book had been read. After a decade of collecting I’ve come to ignore the smaller things unless of course you have a first signed editions worth 5 to 6 figures