Extramarise I Cobalt Alloy
Extramarise I is Mizutani’s proprietary cobalt-alloy blade-material name, used on models including TWIG and Ichi-Nino-San. Mizutani also uses Extramarise for a heat-treatment process. The material designation connects a product to the maker’s specification; blade design and model details remain essential for understanding its intended cutting use.
Read a steel claim as a four-layer record
A grade can be useful evidence, but a finished shear adds maker execution, geometry, condition, and service history. Apply to Extramarise I Cobalt Alloy
- 01 Identify the grade Use a producer or traceable maker designation.
- 02 Name the source layer Separate mill data, maker data, seller copy, and measurement.
- 03 Record execution Heat treatment, geometry, assembly, and finished-blade values stay model-specific.
- 04 Keep the history Condition, use, care, impacts, and service affect the working edge.
Do not inferOne element, HRC value, country adjective, price tier, or steel name cannot rank sharpness, toughness, corrosion resistance, or service life.
Material and process
Mizutani’s global Extramarise I material page describes a cobalt alloy treated through its Extramarise process and lists the products assigned to that material. It supplies a useful link between material name and finished model. It does not provide a full chemical recipe, processing schedule or HRC value.
The maker’s North American materials account adds a relative comparison: I has more molybdenum, II more vanadium, and both have the same cobalt amount. It also describes a process including a sub-zero step. Keep those statements attributed to that regional maker account; no percentages or controlled finished-blade comparison are supplied there.
The names I and II therefore identify different maker materials. They do not, by themselves, establish a generational upgrade, a hardness ranking or an edge-life guarantee. A heat-treatment name is also a separate part of the specification from the alloy’s chemical composition. See the composition guide for how to record those fields.
Named models and intended work
The global material catalog supplies the following examples. Application labels and ratios are the maker’s catalog descriptions, not results of an independent cutting test.
| Model | Published context | Practical comparison |
|---|---|---|
| TWIG | Cutting model listed in 5.0, 5.5 and 6.0 sizes | Compare the size and handle fit for the work |
| Ichi-Nino-San 1 | Blunt-cutting model | Evaluate the finished blade for a clean line |
| Ichi-Nino-San 2 | Slide-cutting model | Check the model intended for sliding work |
| TWIG THINNING 15 and 25 | Regular thinning models with stated ratios of 15% and 25% | Keep each ratio with its exact model |
These examples show why the model is as important as the material. The same material category contains cutting and thinning tools and more than one intended technique. A thinning percentage is a model specification; the section of hair, placement and number of passes still affect the actual result.
Comparing Extramarise I with II
Start with the two exact models you are considering. Record their material designations separately, then compare length, blade shape, handedness, handle position, tooth arrangement where applicable and the maker’s stated use. For a previously serviced tool, include its condition and sharpening history.
If a seller supplies a hardness value, ask which model or material it describes and who published it. A range borrowed from another Mizutani material does not fill the missing figure for Extramarise I. An HRC claim should retain its source and scope just as a composition claim should retain its material identity.
The relative molybdenum statement helps distinguish this material in the maker’s account. It does not quantify the amount, explain every processing difference or predict how a particular pair will feel in your hand. The useful next step is a comparison of the finished tools for the intended work.
A model name can span different materials
Fit Puffin Thinning 17 provides a documented example of why a generation check matters. The original maker record places product 104238 in its End of sale catalog and names Extramarise I. The NEW record names Extramarise II for 104866. Both were checked on 30 September 2026.
| Maker record | Material | Product number | Blade length | Published reverse cut ratio |
|---|---|---|---|---|
| Original Fit Puffin Thinning 17 | Extramarise I Cobalt Alloy | 104238 | 63 mm | 20–30% |
| NEW Fit Puffin Thinning 17 | Extramarise II Cobalt Alloy | 104866 | 63 mm | 20–30% |
The matching blade length and cut-ratio range do not establish an identical tool. The maker also gives different ring dimensions for these generations. Identify the code before comparing an offer or requesting parts; the original model record explains those measurements.
This is a specific change between two documented models. It does not prove that Extramarise II universally replaces I, that either name fixes a hardness number, or that the newer tool has a measured cutting advantage. No full chemistry or comparative performance result is supplied by these model listings.
Care and selection
Follow the instructions supplied for the exact Mizutani model, including cleaning, drying, lubrication, adjustment and service. Keep blades protected and seek appropriate assessment if cutting action changes or the tool is damaged. The alloy label does not establish a fixed sharpening schedule.
Before committing to a model, identify the service route available in your region and what that service covers. A regional warranty or support arrangement should be checked against that region and product rather than applied to all Mizutani scissors worldwide.
Source
- Mizutani global: Extramarise I: material identity and the model/application examples above.
- Mizutani North America: About Mizutani: relative alloying and processing account.
- Mizutani global: Extramarise II: comparison material catalog.
See Also
Extramarise II · Cobalt Alloy · Hardness guide · Scissor Maintenance
Sources
4 sources- 🌐 Mizutani Scissors — Global (Japan HQ) (manufacturer official)
- Mizutani Scissors — North America (manufacturer official)
- Mizutani: original Fit PUFFIN THINNING 17, reverse configuration (brand official)
- Mizutani: New Fit PUFFIN THINNING 17 generation distinction (brand official)
Frequently Asked Questions
4 answers you can open one at a timeWhat is Extramarise I?
It is Mizutani’s proprietary cobalt-alloy blade-material name. Extramarise also names the heat-treatment process. Identify the exact finished model to understand its design and intended use.
How does Extramarise I differ from II?
Mizutani’s North American account says I has more molybdenum, II more vanadium and both the same cobalt amount. It provides no percentages or controlled performance comparison; the global catalogs list separate model groups.
Does Extramarise I have a published HRC?
The global material page and regional account cited here do not publish a material or finished-model hardness for Extramarise I. A value from another material should not be transferred to it.
Does every Fit Puffin Thinning 17 use Extramarise I?
No. The original maker record identifies product 104238 as Extramarise I, while NEW Fit Puffin Thinning 17 identifies 104866 as Extramarise II. Both list a 63 mm blade and a 20–30% cut ratio, so those shared figures cannot identify the generation.
Comments & questions
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