off and enters into a removing bath bare fiber without any polymer thus comes out just before proceeding to the plating baths the resulting bare fiber preferably goes through several liquid baths without physical contact with any solid materials only liquid and its fiber surface is processed in liquids such as cleaning rinsing dry sinsetizing and plating in particular the fiber preferably travels through the bath solutions without any physical contact with any hard material until the fiber becomes enough robust with metalic deposition growth water soluble polymer becomes solid when it is dried and it becomes liquid when immersed in water as for water soluble polymer sodium polyacrylater plyacrylamide polyvinyl alcohol polyethyleneimine polyethylene glycol polyvinylpyrrolidone etc are applicable viscosity of the water solution is preferably controlled to be 1 5000 mpa s is good for application of fiber coating one example of a water soluble polymer believed to be suitable for this purpose is vinyl alcohol copolymer product name nichigo g polymer oks 8049 sold by nippon gohsei in this regard fig4 illustrates a vertical fiber drawing process where the fiber 18 is continuously coated with water soluble polymer as a temporary protective coating first a water soluble polymer solution is prepared with appropriate.