Today's technique is called back stamping. You use the back of the stamp as a background for the front of the stamp. A tutorial on this method can be found here.
Sue put this to good use on her card.
Here is a closeup of the detail
For this challenge, I stamped the three sizes of flowers with Hero Arts Shadow Inks – Ultra Pink, Tide Pool and Passion Flower. I then turned the stamps over (to stamp with the reverse side of each stamp) with Hero Arts Shadow Inks – Bubble Gum, Sea Glass and Orchid, trying to line-up so that the stamping enveloped the original stamp impression. The sentiment was stamped with Hero Arts Charcoal Shadow Ink. The entire card panel was matted with purple cardstock.- Sue
I went with another birthday card -
There was a birthday candle that I thought might make a good stamp for this technique. I stamped with the back of it across the bottom and top of a card using Momento Dandelion. I then used a Chromatix Pen in Apricot to apply ink to the front of the stamp and stamped on top of the yellow images. I used some paper I had from The Paper Studio to use as a colorful strip in the middle and stamped the sentiment stamp with Versafine black ink. It mad for a bright and cheerful card. - Denise