MIR Teijin Flat Brush 401 - Oil and Acrylic

MIR Teijin Flat Brush Ref. 401 — synthetic precision for oil and acrylic

Flat brush with Teijin synthetic fiber, made by Pinturas MIR (L'Hospitalet de Llobregat), Spanish fine art paint house active since 1933. Teijin fiber is a polyester filament from Teijin Limited (Japan) that MIR mounts in this model; it differs from Toray fiber, present in other MIR brushes of the same shape, in the glide and paint loading described by specialized industry literature.

What is it used for?

Oil and acrylic: the only two uses the manufacturer declares for this model.
Due to its flat shape, it spreads paint in wide, even layers — a technical shape criterion, not manufacturer data about a specific support or technique.
According to specialized industry literature, the loading and glide of Teijin fiber favor glazes and medium-to-thick oil layers compared with Toray fiber — a relative comparison between fibers, not a measured fact.

Why choose the MIR Teijin Flat Brush 401?

Made by Pinturas MIR, Spanish fine art paint house with a history since 1933, specialized in fine arts and restoration.
Synthetic Teijin fiber, solvent-resistant according to specialized industry literature — suitable for working with varnishes and solvent-based media.
Cupronickel ferrule, corrosion-resistant, and varnished wood handle.
Includes factory plastic protector for hair and ferrule, which prevents deformation during transport and storage.

Presentation and storage

Presentation: 13 individual sizes, from No. 0 to No. 24, and a pack of 3 (Nos. 2, 6 and 12).
Store with the factory-included plastic protector for hair and ferrule when not in use.
Shelf life: not declared by the manufacturer. It is recommended to clean the brush after each use with a specific brush-cleaning shampoo to extend its lifespan.

The limits, stated

Not the best option for chromatic reintegration or precision retouching: its flat shape spreads a wide layer, without a fine point. For that task, the catalog has the MIR Teijin Round Brush Ref. 400, with the same fiber and a round tip.
No manufacturer data on resistance to a specific solvent — for example acetone: this compatibility is not claimed, although it does resist solvents in general according to market literature.
The manufacturer does not declare a shelf life in number of uses or years: durability depends on care and cleaning after each use.

Frequently asked questions

Does it work for varnishing the finished piece?

Yes: its flat shape spreads varnish in wide, even layers, and Teijin fiber is solvent-resistant according to specialized industry literature. This is not a use the manufacturer expressly declares for this model, but it is supported by the technical criterion of shape and fiber.

Does it work for chromatic reintegration or precision retouching?

Not the best option. The flat shape spreads a wide layer and offers no tip for detail work. For that task, the catalog has the MIR Teijin Round Brush Ref. 400, with the same fiber and a round tip.

What is the difference with the Toray fiber of other MIR brushes?

According to industry literature, Teijin fiber is geared toward detail techniques and glazes in thicker media, while Toray offers a more uniform glide in layers — with no standardized test measuring the difference. For comparison, the MIR Toray Flat Brush Ref. 132 has the same flat shape with the other fiber.

Does it withstand strong solvents like acetone?

There is no manufacturer data on a specific solvent. Market literature indicates that Teijin fiber generally resists solvents well, but its behavior against acetone specifically cannot be confirmed.

What do you clean it with?

With MIR brush-cleaning shampoo, designed by the manufacturer itself to extend the life of its synthetic-fiber brushes.

What sizes are available?

13 individual sizes, from No. 0 to No. 24, and a pack of 3 (Nos. 2, 6 and 12).

What are the handle and ferrule made of?

Varnished wood handle and corrosion-resistant cupronickel ferrule — manufacturer data.

Is it a natural-hair or synthetic brush?

Synthetic: Teijin fiber, from Teijin Limited (Japan), mounted by Pinturas MIR.

Do you have any questions? Write to us on WhatsApp, visit innovart.art or email us at info@innovart.art and we will advise you.