All standard images are printed on Epson Enhanced Matte paper using Epson UltraChrome K3 ink.  The printer is an Epson R2400.  This ink and paper combination results in an image that will last for 76 years (under glass) according to independent tests.  The large format (13" x 19") can be on Epson Watercolour paper Radiant White.  This will result in an image lasting 118 years.  

Test results here.

The mats are acid-free.  The top mat is white with a black core while the inner mat is dark green with a black core.

Matted prints and cards are individually bagged.  The non- standard, larger prints will only be shipped unmatted.