Preparation of an ice surface, useful for ice rink, and ice sports cars and trains, comprises freezing water in which an inorganic substance e.g. ammonia, alkali hydroxide, hydrogen halide, nitric acid and sulfuric acid, is added

摘要

Preparation of an ice surface for an ice rink comprises freezing water in which an inorganic substance is added; where the inorganic substance is ammonia, an alkali hydroxide or alkaline earth hydroxide, a hydrogen halide, nitric acid, sulfuric acid, phosphoric acid, alkali-, alkaline earth-, or ammonium salt of the acids and/or ammonium hydrogen carbonate.