Granules for Tie Layers: How Dry Dye Powder Moves Through a Tied Shirt
Granules are just dye before it meets water. Put dry dye powder on top of a tied shirt, add a little water, and the layers of the fold decide where that color goes. In my studio that is called irrigation, and it is the whole subject of Episode 2 of the HiChroma Framework. Here is the short version, straight from the bench.
What the powder is actually doing
The fiber does not care how the dye got there. Ice dyeing, irrigation, liquid, immersion: those are not different kinds of tie dye, they are different ways of delivering dye to the fiber. Granules on a tied shirt are a delivery method. The powder sits on top, water dissolves it, and gravity and the spray carry it down through the layers.
That is why the fold matters so much. A thick fold like a Ron Star is an eight point folded over on itself. That is a lot of fabric. The top layers get the dye first and the strongest. Everything underneath gets what is left after the layers above have taken their share. The sinew lines resist. The color splits as different parts of the dye travel at different rates. That is where the effects come from.
How much powder
Less than you think. On a full Ron Star I sprinkled a tablespoon, maybe two, and that was plenty for the whole shirt. I started four experiments with four tablespoons of dye and still had about that much left at the end.
When I started out I came from ice dyeing and dumped a ton of dye on everything. You do not need it. What you do need is coverage. I give the whole top a light coating and look for any bit of white left showing. Every exposed spot gets a little powder, because if water hits fabric with no dye on it, that spot fills with plain water and the color cannot get in later.
Soda ash: mixed in, late, or not at all
My standard mix is soda ash and dye together, two parts soda ash to one part dye, sprinkled straight on the shirt. That activates and pushes at the same time.
In Episode 2 I ran it four ways on the same fold with the same color:
Dye only, no soda ash. The color flows freely, and nothing is locking it in place until the cure.
Dye first, soda ash sprinkled on a few minutes later. You get the flow, then it locks where it sits. More striking chroma where the soda ash landed.
The 2 to 1 mix from the start. This is my normal process.
Hot water with a lot of soda ash and very little dye, half a cup of soda ash to one tablespoon of dye. The dye hits the brakes fast. Lots of white, really intense color where it did strike.
You cannot really overdo soda ash. The only thing too much does is clump on the surface, and you do not want that. If you are going to sprinkle it, keep it light.
Water is the control
Moisture is your enemy. To be more particular, moisture without dye in it is your enemy. Use the least water it takes to move the dye.
Any cheap pump sprayer works. I run mine on the lowest setting. You are not blasting the dye off the top, you are letting it soak in.
Watch the surface. You will see the water sit, then disappear, and the color goes with it.
Work in sections. With soda ash in the mix, things start locking up as you go, so I do one section, read it, and move on while the dye is still flowing.
Spray from more than one direction on a thick fold. If you only hit it from one side, the far side gets shortchanged.
Feel the weight. There is a maximum amount of water a tied shirt can hold. When it feels like a full diaper, it is full.
Temperature is a setting too. My experiments ran around 94 to 98 degrees. Hot water sets the dye up faster and raises the chroma, and it can push almost pure color through, but it also changes how far the dye gets before it locks. I wrote more about that in hot water irrigation is just irrigation.
Read it from underneath
This is the big advantage over ice dyeing. With ice you wait until everything melts and have no idea what is going on. With granules and a sprayer you can check the whole time. I set the piece on a plain cooling rack so I can lift it and look at the bottom without disturbing it.
When there is still dye on top, a little water brings color back up to the surface. When nothing comes up, the top is spent. At some point you commit: no more dye, just push what is there through. You can usually tell right then where it is going to be white.
For single colors I push everything from one side. It maximizes the splits, and I do not want to put more color on top of the effect I just made.
Then cure it
Powder on and water through is not the end. The dye still has to cure. I use what I call a boil batch: tap water with a little soda ash brought up to a boil, enough to cover the pieces. The heat is doing the work. Episode 1 covers curing in depth in the foundations of fiber reactive tie dye.
Watch the whole thing
Every step above is live in Episode 2, four shirts, one color, start to reveal. The full transcript is here: Irrigation tie dye: how dye moves through fabric, soda ash and water temperature.
Pick one color. Do it four or five times. Watch how it splits. That is how you learn it.
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