The new Ph.D. collaboration monster SOLID is amazing!
When using scissors that can’t fix the handle in place and don’t have good balance, it takes extra effort to prevent wobbling. For stylists who open and close their scissors hundreds of times in a single day, even the slightest extra work can cause problems like tendovaginitis. With the innovative new “G-SHIFT” design, the scissors’ center of gravity is shifted closer to the hand, while keeping the balance set and avoiding increased centrifugal force during opening and closing operations. Together with the new handle that molds perfectly to your hand, these elements stabilize the blades, and prevent wobbling during cutting.
Source: Yukari Aoki, “Effects of the Way Styling Scissors are Held on Usability” (Ueno Laboratory, 2011 Graduate Study)
The joint section has the important role of joining the blade and the handle, and in these scissors, it’s fitted with 9 precision ball bearings. Thanks to this design, the movement is smooth as silk.
The new SOLID uses our proprietary Extramarise® Processing, a unique hardening process based on thorough temperature management that brings out the characteristics of the materials to the greatest extent possible. This process gives the scissors the hardness they need, as well as sufficient durability. This time, with the cooperation of the metals engineering expert Dr. Asakura, we’ve analyzed the structure of the SOLID’s raw material following the proper heat treatment processing. Comparing the SOLID’s treated material with other untreated materials, the difference is obvious. The results of this analysis proved that heat treatments can make a huge difference in scissors’ working life.
Extramarise® (registered trademark), is a proprietary heat treatment process* ideally suited to haircutting scissors, developed by Mizutani using data and experience accumulated over a period of more than 90 years to balance the three required properties for a good blade: structure, blade angle, and hardness.
Heat Treatment Process
The metals used for edged tools change a great deal depending on the heat treatment used. Proper heat treatment for each material must be carried out in order to fully draw out the properties of rare metals within it, such as cobalt, molybdenum, and vanadium.
Perhaps you’ve heard the term “heat tempering” before. The metals used for scissors don’t initally have sufficient hardness for this use. The stainless steel used in scissors is first heated to over 1000°C, then rapidly cooled to achieve the required hardness. This process is called “hardening.” (For Stellite and other cobalt alloys, different temperatures may be used.) Also, with only hardening, the metals are hard enough, but extremely brittle, so they undergo a “tempering” process to achieve greater durability. For even higher quality edged tools, a further treatment called “sub-zero processing” subjects the metals to a temperature of -100°C or below using materials such as liquid nitrogen in between hardening and tempering to prevent structures that have not completely undergone martensitic transformations (retained austenite) from causing deformations in the course of use (changes occurring over the course of several years).
“Hardening,” “tempering,” and “sub-zero processing” can be combined in an infinite number of ways, and carrying out the ideal combination for high-grade materials to bring out their latent properties to the greatest extent requires an abundance of knowledge and experience. Through the Extramarise® process, developed at Mizutani through analysis of massive volumes of data and experience, we provide metals which leverage the materials of their constituent elements effectively.
Chiba Institute of Technology, Professor of Department of Design
Yoshiyuki Ueno, Doctor of Engineering
Societies : Member of the Board of Directors, Japan Society for Interior Studies Member of the Board of Directors, Japan Society for Office Studies Member of the Board of Directors, Japan Toilet Association etc.
Research Fields : Measurement of human bodies and movements, physiological measurement; ergonomic design for chairs, seats, beds; ergonomic design for sink areas for kitchens and bathrooms; ergonomic design for writing materials and other tools; etc.
Publications : “Building a School Bathroom Together: Removing the Barriers in Our Hearts” (School Toilet Research Society), “Illustrated Ergonomics” (Japanese Standards Association), “Interior Planning and Design” (Shokokusha)
Department of Materials Engineering at the School of Engineering, The University of Tokyo (Part-time instructor at the Tobu College of Medical Technology)
Dr. Kentaro Asakura, Engineering
Research Fields : Ultra-supercritical pressure power generation systems, multi-layer steel sheeting for automotive uses, material analysis and development using electron microscopes, etc.
Publications (Separate Volumes) : Talking about Microscopes and Talking about Non-Woven Fabrics (Japanese Standards Association), 5-volume microscope series including Macro Observation and New Microscope Q&A and All About Edged Tools (Agne Gijutsu Center).