Stamping on bottle caps can create fun results. You just need a blank bottle caps, permanent ink, an acrylic or water-based sealer to prime the cap with and a stamp.

Bottle caps are a little tricky to stamp on because they're quite smooth and just slightly curved so your stamp will probably want to slide a little. Just use a steady hand and don't rock your stamp, but press firmly. Once you get the hang of it you'll be stamping your bottlecaps flawlessly. If you decide to flatten your bottlecaps as we did for these two cards, be sure to stamp your bottle cap first.

Primer
Some bolder stamps will look better if you first prime the bottle cap with a clear sealer such as 3-D Crystal Laquer or Diamond Glaze. Just rub the primer on with your finger and let it dry. Matte spray fixative was disappointing as a primer as was white craft glue that dries clear.

Types of Ink to Use
The first card was made using three different kinds of ink. The first cap was stamped with Ranger Archival permanent ink. The second bottle cap was stamped with Brilliance ink and the third was stamped with ColorBox Chalk. All were heat set. The dye inks need to be wiped clean to remove a little ink residue but the the image remains cleanly stamped. Other brands of permanent ink, will likely work just as well. The red samples, further down the page, stamped with the "LOVE YOU" stamp were stamped with StazOn. I didn't have great success with many of the colors of Palette Ink pads when stamping bold images. They were just a little too wet and thin, even with primered bottle caps.

Flattening
A hammer was used directly to the edges of the bottle caps to flatten them the first card. The centers were then hammered to give a more used appearance. The bottle cap on the second ard was flattened by hammering it between two pieces of scrap acrylic pieces.

The sample bottle caps in figures A-E weren't flattened. These images were photographed to demonstrate instances in which primering the bottle caps is important.

A - stamped with permanent dye ink with no primer
B - stamped with permanent dye ink over acrylic matte primer
C - stamped with StazOn ink on unprimered bottle cap
D - stamped with StazOn ink over acrylic matte primer
E - stamped with Palette ink on unprimered bottle cap

I found that stamping less bold images, like in figure E, primer was not as important nor was the type of ink so long as it could be heat set permanent.