I did a quick little painting to see whether only using the more expensive Winsor and Newton gouache paints would result in stronger colors than mixing them with my cheaper ones. I think it did. The top image is how it looked just after washing off the ink. The second is after removing more ink in Photoshop. I thought maybe the top one had more character and the second one had lost some vibrancy so I increased the Brightness and Contrast to get to the third one.Which do you like best?