Denim: Properties & Sewing Tips | Fabric Guide

Denim is a sturdy cotton twill fabric that originally came from the French city of Nimes ("de Nimes" = from Nimes). It is characterized by its diagonal rib structure and typical dyeing, where only the warp threads (usually with indigo) are dyed while the weft threads remain white. This gives denim its characteristic back side and the typical fading effect when worn.

Properties of Denim

Extremely durable and long-lasting
Characteristic diagonal twill weave
Develops individual wear patterns when worn (fading)
Available in various weights: light (6-8 oz), medium (9-12 oz), heavy (13+ oz)
Also available as stretch denim with elastane content

Uses for Denim

Jeans and denim pants in all cuts

Denim jackets and vests

Skirts and dresses

Bags and accessories

Shirts and blouses (light denim)

Care Instructions

1 Wash before first wear to reduce color transfer

2 Wash inside out at 30-40 degrees to minimize fading

3 Wash denim separately as it bleeds heavily at first

4 Air dry, tumble drying can cause shrinkage

Sewing Tips for Denim

Use a special jeans needle: Jeans needles (size 90-110) have a reinforced point that penetrates multiple layers of fabric and seams without breaking. Change the needle regularly as denim dulls it quickly.

Master thick spots: At points with many fabric layers (e.g., waistband intersections), you can hammer the fabric flat or use a hump jumper. Sew slowly and help the machine by turning the handwheel.

Typical jeans details: For authentic jeans, use contrasting thread (orange/gold) for topstitching, rivets at stress points, and real metal buttons. Double flat-felled seams reinforce side seams and inseam.

Frequently Asked Questions about Denim

What does the ounce (oz) specification mean for denim?

The ounce specification describes the weight of denim per square yard. Light denim (6-8 oz) is suitable for shirts and summer clothing, medium denim (9-12 oz) for classic jeans, and heavy denim (13+ oz) for rugged workwear. Raw denim for enthusiasts can weigh up to 21 oz.

What is the difference between raw denim and washed denim?

Raw denim (also called dry or rigid denim) is untreated jeans fabric that has never been washed. It is stiffer and develops individual wear patterns through wearing. Washed denim has been industrially treated (stonewash, bleaching, etc.) and is softer and more supple but doesn't show the personal patina of raw denim.

What sewing machine do I need for denim?

For light to medium denim, a sturdy domestic sewing machine is sufficient. For heavy denim (12+ oz), a machine with a stronger motor and the ability to feed thick fabric layers is recommended. Important are a high presser foot lift and the ability to use a jeans needle in size 100-110.

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Canvas Cotton

Denim at Stoffmarkt

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