The last couple of weeks I have been making a series of pen drawings accentuated using Gouache and ink. 

Some of these drawings use paper collage in the background.

Both gouache and ink are pretty fluid Media, and very responsive to how you handle them. 

Being water soluble makes them easily adaptable, but unlike watercolours, once dry they are permanent. I found both media well-suited for botanical drawings. What do you think of the outcomes?