Why your black shirt goes grey at the collar first

Look closely at an old black shirt and the fade is rarely even. The collar and cuffs usually go first, noticeably lighter than the body of the shirt. There's a specific reason for that.

Friction, not just washing

The collar rubs against your neck and jacket lapels all day. Cuffs rub against desks, bags, and sleeves being pushed up. That constant contact wears surface dye away faster than washing alone ever would, which is why those two spots grey out first even on a shirt that's otherwise holding its colour.

Sun exposure adds to it

The collar and upper chest get more direct sun than the rest of a shirt tucked under a jacket or bag strap. UV breaks down dye over time, compounding the friction damage in exactly the same spot.

Surface dye vs fibre-locked dye

Most black cotton is dyed on the surface of the fibre, which is exactly what friction wears away first. A colour-lock process that bonds pigment deeper into the fibre gives friction less to strip off, which is the actual mechanism behind a shirt staying evenly black at the collar as long as everywhere else.

What you can control

• Wash cold and inside out — heat accelerates dye loss at friction points.
• Avoid rough-textured jacket collars rubbing directly against the shirt collar for hours daily.
• Rotate shirts rather than wearing one on repeat every single day.

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