Abstract: An ear shield assembly comprises a headband fabricated of semi-rigid material and formed in a generally semi-circular configuration, the headband having two free ends; and two ear covers each formed in a hollow generally semi-spherical configuration, each ear covering having a concave inner surface and a convex outer surface, a free end of the headband being coupled through each ear cover, in an operative orientation a user placing the headband across his forehead, the user then positioning each ear cover over the auricle of an ear, the apparatus protecting a user's forehead and ears from hair dye during hair coloring.

Abstract: In the treatment of the swimming pool water, the water is continuously withdrawn from the pool and brought into contact with semi-permeable membranes of a separating apparatus. The fraction of the water which has passed through the membranes is returned to the pool.

Abstract: Pulp mill effluents, particularly soda-containing treatment liquors, are subjected to a separatory treatment comprising a pre-treatment with flocculating agent in a sub-critical amount incapable of effecting flocculation, followed by an ultrafiltration of the pre-treated effluent.