tif, jpg, pdf, psd, dng, png.
Size is not restricted but the bigger the file the longer the upload time.
Large prints can only be done from large files and good quality images. See here for advice on size.
The papers used are a museum quality, generally sourced from Permajet and have an incredibly long life when matched with quality inks.
The papers I print on are matt, satin and gloss which all have different characteristics and finishes.
Matt: Smooth Fine Art 312 gm.
Satin: Oyster 271 gm.
Gloss: Titanium Gloss 300 gm.
The high quality inks I use are are supplied by Marrutt.