Patent ID: 8002687

Claim:
A method of reinforcing a roller cladding material comprising a fibre board, the method comprising the steps of a) first contacting the cladding material with a fluid medium comprising a reinforcing agent whereby fluid is absorbed by the cladding material and b) second drying the cladding until the surface of the cladding is dry to the touch wherein the reinforcing agent is selected from the group consisting of a water soluble phosphate glass comprising from 30 to 80 mol % P 2 O 5 , from 20 to 70 mol % R 2 O, from 0 to 30% MO and from 0 to 15 mol % L 2 O 3 , where R is Na, K or Li, M is Ca or Mg or Zn and L is Al or Fe and a water soluble borate glass comprising from 30 to 80 mol % B 2 O 3 , from 20 to 70 mol % R′ 2 O, from 0 to 30% M′O and from 0 to 15 mol % L′ 2 O 3 , where R′ is Na, K or Li, M′ is Ca or Mg or Zn and L′ is Al or Fe.