If you store your butcher paper correctly, it should not form bark. Bark is caused by the paper being stored in an environment that is too dry or too humid. If you live in a dry climate, you can store your butcher paper in a plastic bag with a damp towel to help keep it from drying out and forming bark. If you live in a humid climate, you can store your butcher paper in a plastic bag with a desiccant packet to help absorb some of the moisture and prevent bark from forming.