I still have some pictures that I painted years ago; nothing has turned yellow or faded yet; this is partly due to the pouring medium, but also to the acrylic paints themselves.
The acrylic paints for the acrylic pouring techniques:
I make sure that the acrylic paints are of excellent quality; a white should still be white even after years and a red should remain red and not fade or bleach.
That’s why I only use paints from the art supply store; these usually have a high level of lightfastness, which ensures that the colors stay beautiful for years.
I use different brands here, depending on the application.
Amsterdam Acrylics by Royal Talens
Paints by Liquitex, Pebeo or Winsor and Newton, to name just a few.
Alongside the painting surfaces, such as canvas or similar, these are the main ingredients for beautiful pouring pictures.