Solution Dyed Material vs. Stock Dyed Material
The process for creating solution-dyed polyester, also known as ‘fade-resistant’ polyester, has to do with the fabric's ability to perform well in many areas of its use.
Polyester in general is a synthetic fabric that begins as a polymer melt (liquid form). In the solution-dyeing process, the color is added during the liquid stage, prior to being cooled and spun into synthetic fibers.
Since the coloring goes through and through and isn't just applied to the surface of the material, the fabric retains its properties more than a stock-dyed fabric would when exposed to intense sunlight and air pollutants.
The process of solution-dying polyester gives the cover material top-rating performance in fade and stain resistance, as well as overall durability.
Stock-dyeing or yarn-dyeing is less expensive process used to color fabrics. Due to the nature of this material, it is unable to outperform solution-dyed materials.
During the stock-dyeing process, the color is applied after the basic white fibers have been spun and tightly woven together. Once the material has been fabricated, the coloring is applied with force to penetrate the porous fibers as deeply as possible.
However, this method, regardless of how much dye or pressure is used, cannot achieve consistent coloring throughout the fibers. This process also makes the fabric more susceptible to fading and tearing as the fabric weakens more rapidly when in intense sunlight.
That said, most polyester materials in the marketplace are stock-dyed due to the costly process to solution-dying fabrics.