Abstract: A collapsible sign comprises at least one flexible sheet with a first message bearing side and a second side which has at least one horizontal support member attached to the second side of the sheet. At least one vertical support member is received free of interconnection with the horizontal support members by a pocket attached to the second side of the sheet. The sign includes a fastening device detachably interconnecting the vertical support member to the pocket. After the vertical support member is removed from the pocket, the sheet may be rolled up or rolled around the vertical support member for compact storage.

Abstract: The invention relates to the coating of particles for use, for example, as inoculants in the metallurgical field.A fluidized bed of metallic-particles (e.g. Fe/Si, Fe/Mn of size range 50 .mu.m to 3000 .mu.m or higher) is contacted with a wash-coat comprising a suspension of a non-dispersible ceramic powder in a sol (e.g. a suspension of Al(OH).sub.3 powder in a boehmite sol). Subsequent controlled drying and firing produces a ceramic coating on the particles which has good adhesion and thermal stability and whose thickness and density can readily be controlled.