I used letter stickers as a mask. After I stuck my letters down, I used a spotty stamp and brilliance ink to stamp over the top of the stickers. When I was satisfied that I had a dense enough background of dots, I removed the stickers to reveal the word. Actually, I made my letters of washi tape because I knew that washi tape is easy to remove. I was very pleased with the confetti-like background for this trendy wedding card so I experimented with inking a rainbow colored confetti background.
I hope to look at my collection of background stamps and try different patterns when I use this masking technique again. (tip: Before removing the stickers, make sure that there is no wet ink clinging to the slick surface of the sticker that will smear onto your project by carefully laying a tissue over the area and gently blotting.)