Here's another of the techniques I showed at Stamp University last month. It's a great technique for backgrounds and can be used in all types of cards.
Start by choosing two or three colours of ink. This technique works best when each colour is darker than the last. The sample shown uses Bashful Blue, Night of Navy & Midnight Muse.
Cut your vellum piece to size. I wouldn't try to do more than an A5 piece at a time because the ink will dry too quickly.
Swipe your lightest ink pad all over the vellum.
Working quickly, swipe the first darker ink over the first colour. Be sure to swipe in different directions so you get some depth.
Swipe the darkest shade last and be sure that the vellum is nice and wet.
Ink up your stamp with Versamark and stamp onto the vellum. The Versamark will "lift" the ink off the vellum leaving the image behind.
Clean the stamp, ink again in Versamark and stamp again. Continue with this step until you have the look you want.
Let the vellum dry for 5 to 10 minutes, or use a heat gun to speed up the process, but be careful or the vellum will warp.
Attach vellum to a piece of light coloured cardstock to really see the pattern & images pop.
Note: You can use either side of the vellum as the front, it's really up to you to decide which side you like best.
Thanks for looking.