Lumi has revolutionized DIY screen printing with its light reactive pigments, Inkodye.  Our hackerspace received a generous kit and had a lot of fun experimenting with the dyes.

I didn't have much time to do the prints I wanted at the actual hackerspace, since I was answering questions about how to use the stuff and helping people edit their photos so we could print the negatives onto the transparency film, but there was extra dye for me to use later.  I'd also ordered some blue to go along with the red and orange that Lumi had sent, in order to make sure people could experiment with all three colors.

My first project, once I'd done some small samples to test the properties of the ink on different fabrics, was a leaf themed splattered design.  I wanted one on silk and one on linen.  Both pieces of fabric were from articles of thrift store clothing.  The silk will be hemmed and used as a play scarf/handkerchief for my kids.  The linen will become the side of a tote.  My mom is threatening some kind of revolt if she doesn't get the linen tote made from the print.

Inkodye works well on natural fibers.  I used some extra techniques after the inkodye, and those are different for protein based fibers (like silk and wool) than for cellulose based fibers (like linen or cotton).

Step 1: Gather Your Mats

You'll need Inkodye supplies, whether you're using protein or cellulose based fabric.  The second two lists are for the additional accents - one for each type of fiber.

You will need:

Linen/Hemp/Cotton (cellulose based) OR Silk/Wool/Other Animal Hair cloth
Inkodye detergent
Spray Bottle
Leaves or other flat, opaque things found outside in your neighborhood (unless your neighborhood is the type in which one can mostly find used prophylactics - in the which case, you'll probably just want to print out some leaf shapes on Lumi transparencies instead)
Glass or Clear Plastic for holding leaves flat
Durable, Flat Surface on which to lay the fabric while it can soak up the light source 
Sunlight or strong UV lamp
something somewhat opaque to cover the spray bottle (I wrapped it in spare fabric) - you don't want the ink to be exposed before you even apply it to the fabric

Optional Accents:

cotton/linen/hemp based fabric - deColourant Plus (whatever color you like), paint brush(es)

silk/wool based fabric - acid dye, citric acid, another spray bottle if you haven't cleaned the Inkodye from your first spray bottle

Oh wow! This is definitely one of the best uses of Lumi I've seen so far :)
This looks totally awesome!
very nice effect!

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Bio: this is the official instructables profile for the Transistor. If Supersoftdrink ends up typing all the instructables for the hackerspace, it's because all the ... More »
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