Items may be interleaved with acid/lignin-free paper.[3] If boxes are only partially full, spacers may be used, or the box may be stored horizontally.[4] Large format material is best stored in a plan cabinet with shallow drawers.[42] The rolling of large items (e.g. maps) should be avoided where possible; but if there is no other option, the item should be rolled around a large diameter archival quality tube.[45]