Cross-section of Quickstone™ Denim Yarn
This cross-section of fibers is shown at 5.5 ratio. Notice that there are significant whiter cores within the dark indigo ring dyed threads.
Cross-section of Quickstone™ Denim and Conventional Yarns at Higher Magnification
On the left is a magnified cross-section of Quickstone™ Denim indigo dyed cotton yarn.

On the right is a magnified cross-section of ordinarily indigo dyed cotton yarn.