🧵 The jeans guide: Production, dyeing, washing and fit

The jeans guide: Manufacturing, dyeing, washing and fit. IOS jeans made from Candiani denim - a sustainable combination

Hardly any other item of clothing is as widespread and versatile worldwide as jeans. From classic blue to stylish black, from casual to elegant: jeans have long been more than just workwear - they are a statement. But how are good jeans actually made? What distinguishes indigo from other dyes and what is behind terms such as "stonewashed" or "raw denim"? In this guide, we give you a complete overview - technically sound, visually inspired and practically explained.

Production: From cotton thread to denim

Raw material & weave

- The basis is cotton, usually woven in twill weave → so-called "denim"

- Characteristic is the diagonal structure (twill)

- Result: robust, durable fabric

Finishing steps ("finishing")

- Mercerization: provides shine and stability

- Sanforizing: mechanical pre-washing → prevents shrinkage

- Mechanical finishing: sanding, scratching, pressing → influences the feel

Advantages of denim

- Robust and durable

- Breathable

- Versatile finishing options

Disadvantages of denim

- Relatively heavy

- Dyeing can rub off

- Production is complex

Dyeing: Indigo and alternatives

Indigo dyeing (classic):

- Originally from the indigofera plant, today mostly synthetic

- Yarn is dipped in indigo several times

- Only the outer fiber layer is dyed

- Advantage: "Used look" develops over time

Alternative dyeing:

- Sulphur dyeing: for black or colored jeans

- Pigment dyeing: cheaper, but less durable

- Modern processes: Ozone, laser or plant-based dyeing (more environmentally friendly)

Washing: the look is created

Why do manufacturers wash jeans?

- To create certain looks (vintage, used, distressed)

- To improve the wearing comfort

- To control shrinkage in advance

- To make the material softer

Typical washing processes

- Pumice stone wash (stonewashed): washed with pumice stones → used look, soft fabric

- Mechanical washing: by laser, brushing or sandblasting → targeted wear, patterns

- Enzyme wash: biodegradation of fibers → soft fabric, more environmentally friendly

- Raw denim: delivered unwashed → develops individual patina through wear

Fits: Slim, tapered, straight - what suits whom?

Skinny fit

- Skin-tight, usually with stretch
- Advantage: Very figure-hugging
- Disadvantage: Not very comfortable

Slim fit

- Close-fitting, modern silhouette
- Advantage: Contemporary look, emphasizes the figure
- Disadvantage: Limited freedom of movement

Tapered fit

- Loose at the thigh, narrow at the ankle
- Advantage: Fashionable, comfortable
- Disadvantage: Can look unflattering on wide calves

Straight fit

- Straight cut
- Advantage: Classic and timeless
- Disadvantage: Can quickly look old-fashioned

Wide fit

- Loose fit with plenty of leg width
- Advantage: Very comfortable, modern street style
- Disadvantage: Can look disproportionate

Relaxed fit

- Wide and loose cut
- Advantage: High level of comfort
- Disadvantage: Less structured look

Note when buying

Check recovery & shrinkage

- High-quality jeans spring back after stretching
- Good indication of high-quality stretch content (e.g. elastane)

Dark jeans vs. pre-washed jeans

- Raw denim (dark): can stain, but very durable
- Pre-washed jeans: can be worn immediately, more comfortable, but often less durable

Practical test before buying

- Squat, sit, walk - check mobility
- Check for possible dye residue on light-colored clothing

Bonus: Sustainability with jeans

The challenges

- Pumice stone leaves fine residues → micro-pollution
- Indigo and sulphur dyeing: high water consumption
- Sandblasting: dangerous for workers

Better alternatives

- Enzyme washing and laser technology as more environmentally friendly options
- Use of organic cotton or recycled denim
- Focus on transparent supply chains (e.g. Nudie Jeans, MUD Jeans)

Who is Candiani Denim?

- Founded in 1938 in Robecchetto con Induno (near Milan), formerly: factory for working fabric → today: one of the most renowned denim weaving mills in the world.
- Core values: Made in Italy, innovation, sustainability - seven decades of precision & responsibility.
- Pioneer in sustainable technologies such as: Candiani Better Cotton, organically and regeneratively grown cotton. Coreva stretch denim, fully compostable and biodegradable.

What makes IOS JEANS special?

- Made from 97% organic cotton and 3% ROICA® V550 elastane - performance denim with high comfort and recovery.
- The denim comes from Candiani, the leading supplier of sustainable, innovative Italian denim fabrics.
- Different fits depending on personal preference: Modern tapered fit: loose at the thigh, narrow at the foot - slim and comfortable at the same time.
Timeless straight fit: loose on the thigh with a straight leg - maximum comfort and easy to combine.
- Shape and fit quality: no shrinkage, no wear; authentic denim look and soft feel.
- Easy care: washable at 40 °C (gentle cycle); no need to iron - body heat smoothes them out when worn.
- Sustainability: minimal use of water, chemicals and energy thanks to Candiani technologies.

Conclusion: technology meets style

Jeans are more than just everyday wear. They are an example of functional fashion in which material, workmanship and cut work together perfectly. Anyone who really understands jeans will recognize that every detail is a decision for quality, comfort and style. IOS JEANS & Candiani Denim - a sustainable combination.