What is colored denim?
What is colored denim?

Colored denim is a type of thick woven fabric made from dyed cotton.
Colored denim (colored denim fabric) is a thick cotton woven fabric made from unbleached yarn (unprocessed yarn) of 10 count or higher, woven in a twill weave, and then dyed.

Figure 1 shows an enlarged view of the Katsuragi fabric before dyeing.

Since it is woven with unbleached yarn (unprocessed yarn that has not undergone dyeing), the finished fabric has no color.

This fabric, when dyed, becomes colored denim (colored denim fabric).

Colored jeans refer to pants made from colored denim (colored denim fabric).

Figure 2 shows the process flow diagram for producing colored jeans.

Weaving with unbleached yarn (unprocessed yarn) creates Katsuragi fabric.

Dyeing this fabric produces colored denim fabric.

Using dyed fabric to make pants results in colored jeans.

Here’s a little trivia: dyeing fabric after it has been woven is called post-dyeing.
* Yarn dyeing refers to dyeing the yarn before weaving the fabric.

Prepare unbleached yarn (yarn that has not undergone dyeing processing).

Weave twill fabric using unbleached yarn (unprocessed yarn) to create Katsuragi cloth.

Dyeing the finished Katsuragi fabric

Make pants from dyed Katsuragi fabric, and you’ve got yourself a pair of colored jeans.

The key to colored denim is dyeing the fabric.

Next, I’ll explain about denim.
What is denim?

Denim is a type of thick cotton woven fabric.
Denim (denim fabric) is a thick cotton woven fabric made by twill weaving warp threads of 10 count or higher dyed with indigo and unbleached weft threads (threads that have not undergone dyeing).

Figure 3 shows a close-up of denim fabric.

Denim fabric is woven using warp threads dyed with indigo in a twill weave.

Denim (denim fabric) is characterized by dyeing the yarns, while the twill-woven fabric itself is not dyed.

Jeans are pants made from denim (denim fabric).

Figure 4 shows the process flow diagram for producing jeans.

Undyed yarn (unprocessed yarn) is dyed with indigo.

The warp threads are dyed yarns, while the weft threads are undyed yarns (yarns that have not undergone dyeing). These are woven in a twill weave to create denim fabric.

Using this denim fabric to make pants results in jeans.

Here’s a little trivia: dyeing the yarn before weaving the fabric is called yarn dyeing.
* Post-dyeing refers to dyeing fabric after it has been woven.

Prepare unbleached yarn (yarn that has not undergone dyeing processing).

Dyeing unbleached yarn (unprocessed yarn) for warp threads with indigo

The warp threads are dyed indigo, while the weft threads are unbleached yarn (unprocessed yarn). These are woven in a twill weave to create denim fabric.

When you make pants out of denim fabric, you get jeans.

The key point with denim is that the yarn is dyed, not the fabric.
The Difference Between Colored Denim and Denim

Colored denim is Katsuragi fabric that has been dyed.
Denim is made by twill weaving yarns dyed with indigo.

The major difference is that colored denim involves dyeing the Katsuragi fabric, while denim involves dyeing the yarn.

Denim fabric and Katsuragi fabric have almost identical textures, but differ slightly in thickness.

Here’s a summary of the differences between Katsuragi fabric used for colored denim and standard denim fabric.
| Fabric types | Fabric | Color | Features |
|---|---|---|---|
| Katsuragi Fabric | Plain-dyed cotton heavyweight woven fabric in twill weave using yarns numbered 10 to 20 | The plain-dyed fabric is post-dyed, resulting in multicolored | Softer than denim fabric |
| Denim fabric | A heavy cotton fabric woven in twill, using unbleached yarn (unprocessed yarn) for the weft and indigo-dyed warp yarns of 10 count or higher. | Indigo blue | Denim fabric is thicker |

Katsuragi fabric is widely loved for its softness despite its thickness.

For example, it is also used for cushion covers, curtains, hats, and other items.
Summary

We’ve summarized the differences between colored denim and denim using diagrams and tables.


Colored denim is made by dyeing Katsuragi fabric, which is woven from undyed yarn (unprocessed yarn).

Denim is a twill-woven fabric made using yarn dyed with indigo.
| Category | Yarn count | Thread | Fabric | Dyeing Method | Types of Dyeing | Color | Fabric Characteristics |
|---|---|---|---|---|---|---|---|
| Colored Denim | Threads numbered 10 through 20 | Both warp and weft threads are unbleached yarn (unprocessed yarn not subjected to dyeing) | ![]() | ![]() | Piece dyeing | The plain-dyed fabric is post-dyed, resulting in multicolored | Softer than denim fabric |
| Denim | Threads numbered 10 through 20 | The warp threads are dyed with indigo, while the weft threads are unbleached yarn (unprocessed yarn). | ![]() | ![]() | Yarn-dyed | Indigo blue | Denim fabric is thicker |





