What is Marathon?
Marathon is the trademarked name of Crane’s basic recipe banknote paper, and it is the substrate on which the US dollar is printed. Though its exact composition is certainly a trade secret, and likely varies by nation and denomination, public sources state that Marathon is made of a mixture of approximately 75% cotton fibers and 25% linen (flax) fibers. The mixed fiber pulp is likely turned into sheets via a ‘cylinder mould’ or ‘cylinder vat’ process. Marathon is also used for other currencies (likely including Sweden and Denmark) and security & financial documents. The US trademark application for the name Marathon was filed on September 30, 1999. This should not be misconstrued as the origin of the paper formula itself – only its current trade name.