Plastic and fibre products supplier Filtrona increased its pre-tax profit by two-fifths in 2010. Underlying profit rose from £46.2m to £64.6m, which was slightly better than expected. These figures strip out amortisation and restructuring costs. Revenues grew by 10% to £489.6m. The growth has come across the business and this is expected to continue in 2011. The fastest profit growth was in the protection and finishing products division, which increased operating profit by 81% to £28.8m. This division makes injection-moulded and adhesive-coated foam and metal products for the oil and gas, hydraulics and controls sectors. Increased marketing spending pushed sales higher. The bonded fibre and hydrophilic foam components business replaced lower healthcare revenues with increased printer systems business. Higher spending on security was behind the growth of the division supplying self-adhesive tear tape and technologies for brand protection. The cigarette filter division showed the lowest profit growth rate as revenues were flat. Panmure Gordon forecasts 2011 earnings of 22.83p a share.