Our company is the biggest manufacturer of core board, electrical insulating board white top linerboard, kraft linerboard and so on. The core board is use for make paper tube and the insulating board is use for make transformers. Please log in our website to get more information about us. http://cnpaper.cn/  Kindly hope there are some products interested for you.
  if you have any interesting of our products don't hesitate to contact me. We will talk about all things. Sincerely.
  Look forward to your reply.
   Best wishes
   Alando