The Chalkboard Technique is so popular right now.
There are several ways to do it - all using black cardstock:
Stamp your image(s) using White Craft ink and leave to dry.
Stamp using White Craft ink and Heat Emboss with White Embossing Powder.
Stamp using Versamark and Heat Emboss with White Embossing Powder.
You can then pick up a little White Craft ink with a piece of Kitchen Roll and work it gently into the black cardstock to create a 'dusty' look.
It's also very popular to draw lines around the edges of the 'board'. This can be done using the White Watercolour Pencil or the White Gel Pen.
Stamp Sets: You Are Loved, Hearts a Flutter
Ink: White Craft Ink
Colours: Basic Black, Real Red, Pool Party, Whisper White
Big Shot: Honeycomb and Square Lattice Embossing Folders, Hearts a Flutter Framelits
Other Products: White Embossing Powder, White Watercolour Pencil