An article (200) for use with an apparatus for heating aerosol generating agent to volatilise at least one component of the aerosol generating agent (204/304), the article (200) comprising a support layer (202/302) having a first surface (206/306), wherein at least a portion of the first surface (206/306) is rough and an aerosol generating agent (204/304) on the portion of the first surface (206/306) that is rough.