Cook 15 cm - Blue Titanium - White Pom, Case - SCARLETT Blade: length 150 mm, thickness 2 mm, weight 111 gr. Finish: Mirror Shine Polish and Electric Blue Titanium. At Walter, we have developed a new technology in the Five-Stage Heat Treatment of the Blade that provides the steel with qualities of toughness, hardness, and cutting durability never before seen in the Professional Sector. Based on our series of forged knives, a blue titanium coating is applied using the PVD technique in high-pressure and temperature chambers where the titanium is brought to a gaseous state to fuse with the steel, sealing all pores and allowing for a blade protected against all types of acid and detergent attacks.