However, someone suggested wool dyeing with food dye. I have old woolen blankets i've been felting up specifically for this, I have vinegar, I have food dye, so yesterday I got cracking on some newborn covers.
Method-soak wool in some water with vinegar for four hours. I used a large mixing bowl with 2 cups vinegar.
Mix up some food dye with water-I used a dash in about 3/4 of a cup.
Lay out some Glad Wrap on a surface you don't care too much about (mental note-not the cream laminex benches of my rental)
Squeeze out wool until it's fairly dry, then pour/drip on dye. I used a tablespoon and a medicine dropper and liked the dropper best, but one bigger than 5mL would have made life easier.
Wrap in Glad Wrap and microwave for two minutes, then rest for two minutes. Do this three times.
Let cool, remove from wrap, rinse with water and lay flat to dry.
The stripey one was first, and I don't think it was quite wet enough or the dye colour strong enough. I then overcompensated on the splotchy one and made it too wet, so my yellow and blue splotches mixed a bit too much! I also need to find something reusable to replace the Glad Wrap, I went through a disgusting amount to make these.
Now to stick some fold-over elastic around them and see whether i've drafted up a decent pattern! It's also inspired me to dye up some yarn in nice, strong boys colours.........one day.