Is a Shinier Sword Blade Better? Mirror Polish, Satin Finish, and Longquan Sword Grinding

Is a shinier sword blade always a better sword?

This question appears regularly in international sword-collecting communities. In 2024, a related discussion in Reddit’s r/SWORDS community received approximately 520 upvotes. A collector had purchased a first sword and was considering changing its existing finish to a mirror polish.

Some participants preferred the visual impact of a reflective blade. Others argued that a satin finish was easier to use and maintain.

The discussion reveals a more important question:

Can the shine of a blade be used as proof of sword quality?

The short answer is no.

Mirror polish and satin finish are surface treatments

A mirror polish progressively reduces visible grinding marks until the blade reflects light clearly.

A satin or brushed finish retains fine, controlled lines running in a consistent direction. It reflects light more softly and does not create a complete mirror-like image.

These finishes mainly affect:

• the visual appearance of the blade;
• how easily small scratches can be seen;
• the difficulty of repairing a damaged area;
• the visibility of fingerprints, oil marks, and cleaning streaks.

However, the reliability of a sword also depends on its steel, heat treatment, blade geometry, balance, assembly, and quality control.

A highly reflective surface does not prove that the heat treatment is correct. A blade with a soft reflection is not necessarily poorly made.

When evaluating a sword, buyers should not rely only on its shine, photographs, or product name.

Why does a Longquan sword require repeated grinding?

Grinding is not simply a final step used to make a completed sword look brighter.

China’s official Intangible Cultural Heritage website notes that traditional Longquan swordmaking used locally available polishing stone, known as *liangshi*, and describes the grinding process as highly demanding. China Intangible Cultural Heritage source

Longquan’s historical conservation planning documents describe the finishing sequence as including coarse grinding, fine grinding, precision grinding, and final polishing. A Longquan government article also lists polishing among the numerous operations involved in producing a blade. 

In simplified terms:

• Coarse grinding addresses prominent marks left after forging and initial shaping.
• Fine grinding progressively reduces marks from the previous stage.
• Precision grinding controls surface consistency and the direction of the finish.
• Final polishing produces the intended sheen, texture, or visible surface details.

The important question is not simply how bright the finished blade becomes.

Each stage must remain consistent, preserve the intended blade geometry, and support the purpose of the finished sword.

This is an important part of Shen Guanglong Sword Craftsmanship: grinding affects not only appearance, but also how the blade’s lines and details are presented.

When is a mirror polish appropriate?

A mirror-polished blade offers several obvious visual advantages:

• strong reflection and visual impact;
• an attractive appearance for display, exhibitions, and photography;
• surface marks and contamination are easier to notice;
• a clean and highly finished presentation when the work is done properly.

It also creates additional maintenance concerns:

• fingerprints and oil marks become more visible;
• small scratches interrupt the reflection;
• an incorrect local repair can create a patch with a different sheen;
• restoring a complete mirror finish may require refinishing a larger area rather than correcting a single spot.

The Reddit discussion was divided because a mirror polish is not an automatic performance upgrade. It is a choice involving appearance, intended use, and maintenance. Original Reddit discussion

Does a satin finish indicate a lower-quality sword?

No.

A consistent satin or brushed finish still requires control over grinding direction, line depth, and the overall uniformity of the surface.

Its practical advantages can include:

• minor handling marks are less obvious;
• local maintenance is less likely to produce a highly visible difference;
• it is suitable for swords that are frequently drawn, handled, transported, or used for practice;
• it produces fewer strong reflections during photography.

In a more recent community discussion, a sword owner scratched a polished blade with a lower-grit abrasive. Moving directly to much finer abrasive paper did not remove the original marks.

The case illustrates why grinding stages cannot simply be skipped. Using finer abrasive material does not automatically restore the previous finish. Reddit blade-polishing discussion

Is a shinier blade more resistant to rust?

A smoother surface may allow moisture and contamination to be wiped away more easily, but shine cannot replace proper care.

The Canadian Conservation Institute identifies moisture, salts from fingerprints, dust, and polish residue as factors that can contribute to metal corrosion. It also warns that inappropriate abrasion and chemical cleaning can damage an original metal finish. Canadian Conservation Institute

Regardless of whether a blade has a mirror or satin finish, basic Daily maintenance should include:

1. removing fingerprints, perspiration, and moisture;
2. wiping along the blade with a clean, soft cloth;
3. applying appropriate corrosion protection for the material and storage conditions;
4. avoiding abrasive refinishing without first identifying the original finish;
5. consulting a professional before polishing an antique, collectible, or specially finished blade.

How should buyers choose?

A high-polish finish may suit a sword intended primarily for display, collecting, or photography. Buyers should nevertheless expect fingerprints and small scratches to remain highly visible.

A consistent satin, brushed, or medium-polish finish may be easier to maintain when the sword is frequently handled, drawn, transported, or used for practice.

Before purchasing, ask the seller:

• Is the surface mirror-polished, high-polished, satin, or brushed?
• Were the product photographs taken under unusually strong lighting?
• What steel and heat-treatment method were used?
• Does the blade show a forged pattern, differential-hardening line, or applied surface pattern?
• What cleaning and corrosion-prevention method is recommended?

A sword should never be judged only by whether its blade “shines like a mirror.”

What matters is the material beneath the finish, the heat treatment, structure, assembly, and whether the grinding work supports the design and intended use of the complete sword.