Winsor & Newton Designers Gouache Color, 14ml, Brilliant Red/Violet

What is the difference in permanent white versus the zinc white color? anyone have both and can tell us the difference?

How opaque is the permanent white? Will the color bleed away after applying with water or does it remain very opaque and block the color underneath?

Is this product nontoxic?

I have the gold and silver gouaches. Will they perform differently if I place them in a pan and let them dry out?