Pulp issued from retention tank is sent to a next BIVIS device device employed for washing, fibers cutting and pulp bleaching. Pulp washing operation is performed utilizing 3 initial compressing and shearing sections on the BIVIS device the barrel of which is supplied with filters. Normally direct washing is performed; https://webdirectory777.com/listings13115794/indicators-on-absorbent-cotton-wool-you-should-know