What is “Buff Polishing”?

A beautiful stainless-steel surface shall reflects like a mirror.

Do you know that this beauty was created artificially, not by the nature of the material?

In general, the surface of the stainless-steel container is polished by hand in a finishing method called “buff polishing”(or “buff finishing”).

What you'll know from this article:

1. What are the methods and effects of buff polishing?
2. What are the disadvantages of buff polishing?
3. What does "Electrolytic polishing" mean? Why shall it be recommended to those people who think "a little bit of contamination is horrible"?

What is Buff Polishing?

Buff polishing is a type of polishing method used to finish the surface of stainless steel.

“Buff” is the name of the tool that used for polishing the surface of stainless steel.

The stainless-steel surface is polished by the “buff” made of cotton or felt by its rotating.

There are several types of buffing, many of which are distinguished numerically, like “#250”, “#800”.

In general, the higher the number, the more glossy and higher the grade of the polished surface.

#800 buffing is also called “mirror finishing” which can make mirror-like reflections on the surface of the container.

Buff finishing also has the effect of removing burrs and scratches during processing and improve the surface smoothness.

However, Nitto Stainless only do the buff finishing for the product when necessary.

This is because of our “commitment” as a stainless-steel container manufacturer, which engaging with the pharmaceutical and food industries permanently.

Disadvantages of Buff Polishing and Nitto Stainless' Commitment

In buff finishing, a kind of polishing powder called “abrasive” is applied to the rotating buff for polishing. At this time, the oil of this polishing agent adheres to the gaps between small scratches caused by buffing.

In Nitto Stainless, we clean the products after buffing, but to be honest, it is very difficult to remove dirt completely in the cleaning process.

In other words, the more you do buffing, the dirtier the surface will get.

In order to minimize the buffing, Nitto Stainless selects the best stainless-steel board carefully to make a beautiful body part of the container without any polishing. And we only applies buff finishing to the applicable range of the container just to remove processing traces.

By ascertaining the conditions under which customers are using our products and the quality they require through our long experience, we are able to make the high-quality Nitto-Stainless products.

Electrolytic polishing is also recommended!

Of course, there are many customers who are concerned about even a little dirt in the container.

In that case, we recommend the “electrolytic polishing” which has a higher grade cleanliness.

If you use electrolytic polishing, you can remove the extremely small dirt from the surface of the container easily!

Why Stainless-Steel Containers getting rusted? How to avoid it?-Part2

Measures to prevent rusting of stainless-steel containers

Make sure that no dirt, salt or moisture remains

Please wash the container to remove dirt and salt. After washing, never leave it in the wet place. Wipe it with a dry cloth and dry it well.

Be careful of scratches and "contagious rust"

We recommend you to handle the containers carefully in order not to make deep scratches where dirt and water could be accumulated. Please use soft sponge or waste cloth instead of metal or hard scrubbing brush when cleaning.
In addition, avoid contacting with other metals that are easy to rust for a long time could prevent the “contagious rust”.

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Why Stainless-Steel Containers getting rusted? How to avoid it?-Part 1

Recently we received some inquiries like “Even though it was made of stainless steel, it soon got rusted” from our customers.

Stainless steel is a very rust-resistant alloy of iron.

Indeed, compared to iron, it is quite hard to rust, but it doesn’t mean it doesn’t rust at all.

Why is stainless steel so resistant to rust?

When exposed to air, it will form a self-healing barrier!

When exposed to air, it will form a self-healing barrier!In stainless steel, chromium bonds with oxygen in the air (=oxidation) before iron, which causes rust, and forms a very thin passive film (protective coating) of a few nanometers.

The passive film is resistant to chemical change and it is so strong that can prevent iron from oxidation(=rust).

Passive coating can be damaged and torn, but it can self-heal in a moment, so it does not leave room for iron to rust.

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