I used Stampin Up Ink color as watercolor to put on a acrylic block. Spray mist water on it. Then inked it to heavy weight watercolor paper. Let it dry naturally. After it dry thoroughly, I stamped flowers and cut it.
I stuck it on heavy weight cardstock and stamped thank you sentiment.
Supplies that I used:
Stampin Up Ink Pads Night of Navy, Old Olive
Inkadinkado Meadow 60-30496
Your next stamp sentiment stamp set