Vanitas 23 work in progress

I have been working on this graphite drawing for over a month now. It is roughly 24" x 18" and slow going. Technically this is another challenge: rendering of the lace of the blouse and the soap bubbles floating in the air, although I am kind of enjoying drawing the bubbles. I accidentally grabbed a wrong paper for this piece and that's also making the whole process more challenging than working on my usual go to material: Bristol board Vellum surface. I just finished laying down the basic tones of the background by rubbing the graphite powder with the areas of bubbles masked out with the masking fluid. I hope I can finish this before the end of July.