Skulls, skulls, skulls

I noticed that I've not put any of my work or drawings on here for a while, I've been drawing skulls and things related to Mexico as part of my personal passions brief. 
Here are a few pictures; 

Black fine-liner and acrylic 

Black fine-liner 

Mono printing 

Paper cut-outs

Ink and watercolour 

Pencil

Ink and black fine-liner

Ink and black fine-liner

Ink

I've tried a different range of drawings styles and using different materials and techniques to draw with and se what i could achieve.