The challenge over at Addicted to CAS is vellum, and for once I knew immediately what I wanted to do but it took 3 attempts before I achieved it!
I started off by stamping the Hero Arts flower in Versafine Onyx Black, then heat embossing it with Wow clear embossing powder. I coloured it on the back with Promarkers in Spring Lilac & Peony, then added clear Wink of Stella to the circles on the front. The greeting by Flowersoft was also heat embossed. The difficulty came when trying to adhere the vellum to the card, and I eventually achieved this with some Woodware Miracle Adhesive Film, although I think that may eventually come unstuck too!