Abstract: A coil of liner for a fire resistant sandwich board is manufactured by providing a continuous web of steel plate (11) coated on one side with a layer of polyester with embedded polyamide spheres, providing a continuous web of transfer material (12) printed with indicia in a sublimable dye, bringing said webs in surface-to-surface contact and running them around part of the circumference of a heated roller (13) to effect printing of the web of steel plate by a sublimation process. The liner has a pleasant appearance and the board manufactured according to the invention shows excellent performance in fire tests.