Very good, as you probably know the bubbling on the black is caused by to much water on thin paper. I find if this is the case, apply a very DRY first layer of watercolour black just to prim the area, then about two layers of acrylic black to darken and seal the area each time, with drying time it will darken and seal, then one last layer of water colour. The use of thicker paper will makes it better, but will not remove it. My way of doing it will. I hope it helps. I like your painting. You are nearly there but there are a few techniques that make the difference if you want just ask and I will tell them to you. Good work

thank you brainfree, this is my first watercolor and i did it because of your paintings...i know i have to work before doing something like you but any advise is very welcome and could help me to progress....

Unos ojos bien logrados, con una mirada muy expresiva, ese logro bien realizado, el trabajo en acuarela es notable la aplicación.