Use a bone folder to perfectly fold scrapbook pages, artful letters, and origami boxes.
Place a ruler on the paper where you want the fold. Hold the ruler firmly in place with one hand. Run the pointed tip of a bone folder along the length of the ruler, pressing it firmly down as you go. Remove the ruler and fold the paper along the scored line.
Buy a Bone Folder from the Martha Stewart Shop
Projects That Use a Bone Folder
Straw Marquetry Picture Frame
Mechanical Dog Cards
Bound Books
Animal Silhouette Pillow

XtremeC: Using the picture above as a guide, the part you are seeing would be the inside when folded in half. The bone folder makes a small 'valley' indentation.
So would you fold the indent on the inside or the outside of the card or paper please? Thank you. :)