Kureha had mastered the process of extracting only the highest-caliber Fluorocarbon crystal from which the leader and line resin is derived; it would be several years, however, before Kureha succeeded in extruding the resin properly to create Fluorocarbon fishing line that met the performance traits desired. Many engineers employed by Kureha contributed significantly to the development process but it was Mr. Hiroshi Sato and Mr. Ohhira who picked up for Mr.Ishii and Mr.Yoshida to tenaciously pursue the development of Fluorocarbon fishing line of only the highest standards. Several successful experiments and tests were conducted along the way to verify the properties and benefits of Fluorocarbon vs. other fishing line products. These milestones kept the project alive and won the support of executive management.

Finally, once quality standards had been established, once the production technology and equipment had been perfected and put in place in a new factory large enough to support the extrusion process, Kureha introduced Seaguar Fluorocarbon Fishing Line to attendees of the 1972 Osaka Fishing Tackle Exhibition. Anglers were impressed by its invisibility and high-density which allows the line to sink faster, providing less suspicious and more immediate access to the strike zone. ››› (continued)