I played around some more with Inkodye, the permanent, water-based dye that develops its color in sunlight. After making easy shadow prints using safety pins and leaves, prints using cardboard cutouts, and a design with a freezer paper stencil, I tried working with a photo negative that I printed at home.
For this experiment, I did a Google image search and set the filters to display large black-and-white photographs. I found an image online that I liked: this desktop wallpaper with a 1962 Ford Thunderbird admired by elegant ladies. "Betty, is that your new car?" "Yes, Shirley. Isn't it mahvelous? Good thing I have a massive driveway so I'll never need to parallel pahk this boat."
I inverted the image in Photoshop to make it a negative and printed it on some old 3M CG3460 inkjet transparency film I found in my closet.
Even if you don't have Photoshop, you can turn any photo of your own into a negative. Bold photos with lots of contrast will work best.
Go to the online image editor Pixlr. Choose "Open image from computer" to upload your photo. From the top menu, choose "Adjustment">"Desaturate" to make the image black and white. Then select "Adjustment">"Invert" to create a negative image. You can also play with brightness, contrast, or levels to get dark blacks and bright whites for good printing. Finally, choose "File">"Save."
Then print the negative onto printable transparency film. Order some from Amazon or the Lumi website. Follow the directions on the package for feeding the sheets through your printer.
If you need larger negatives, try splitting your image in half, printing on two sheets, and taping them together.
Or if printing your own negatives sounds like a pain, you can download the Lumi iPhone app to order custom negatives delivered to your doorstep.
After printing out my negative, I got the fabric ready. A piece of cardboard wrapped with a plastic trash bag makes a great waterproof work surface. I taped my piece of cotton canvas down to hold it in place while brushing on dye.
Then I poured a little Inkodye into a cup and brushed it on with a foam brush. Doing this in a room with subdued lighting is important— you don't want the dye to start changing color before you're ready! Try to get an even layer of dye on the fabric. The cloth doesn't need to be soaking wet; just thoroughly coated.
Mix Inkodye with water in a 1:1 ratio to stretch it farther; you'll get the same vibrant color. Or add even more water to get lighter colors. Mix colors to create new hues if you want.
I used a paper towel to blot off all the excess dye I could remove. Too much moisture can cause condensation on the negative, and this can mess up your print.
Then I laid the negative on top of the fabric, printed side up so the ink wouldn't get wet and smear. In case there was a slight breeze outside, I stuck on a piece of tape to secure the negative so it wouldn't blow away. Add more tape if needed, but I wouldn't recommend taping down all the edges or you'll trap more water inside, increasing condensation.
Then I carried the board outside into direct sunshine. See the little animation I made? That's what it looks like as the dye starts to change color from nearly clear to purplish indigo, and eventually to blue. Condensation started to appear which worried me; I've had prints ruined by that before, but this one turned out okay.
After 10 minutes of exposure, I took the board back indoors to a dim room and removed the negative.
Then I immediately washed the fabric with laundry detergent in hot water. The goal is to remove the undeveloped dye from the light areas before it turns color. Wash really thoroughly or put your print right into the washing machine. The Inkodye company recommends washing it twice. The dye is permanent, so don't freak out that you'll wash off the blue areas. They're there to stay, so you can dye clothing and bags and wash them regularly going forward.
Here's the final print.
I decided these ladies needed some friends, so I chose this McCall's pattern fabric for a lining and sewed this print into a zippered pouch.
You could make prints of your kids, your house, your Prius, or your Persian kitty. Print on aprons, t-shirts, hoodies, or pillows. Good times!