The light areas are the areas where ice melted. The paint there got mixed with the melting water.
Here is another example. You can see that with this fabric more ice cubes were used, resulting in a very pale fabric.
The fabric is very light, but in this detail photo you can see that it is very pretty:
This is my last blogpost about snow and ice dyeing. I hope you enjoyed them and that it gave you inspiration for the coming winter.