Gloss - Shiny Surface that has tremendous impact. It is highly reflective however and is not normally used for enlargements (except when choosing metallic paper).
Lustre/Matte - more subtle surface that stand up to day to day handling more readily. It is resistant to showing fingerprints and because it's not so reflective, it is the paper of choice for enlargement sizes,
Metallic - Our premium paper surface for that special print. Works well with bold colours (red's blue's & greens) and give the print an almost 3 dimensional feel. Smallest paper size is 6x8 - 15x20cm (you could lay out 2 4x6 - 10x15cm prints on that).