For large amounts (in my case 5-7 skeins in a pan!) LARGE Saucepans with lids feature at the top of the list!! Saucepans need to be dedicated dyeing pans as you MUST NOT cook food in them after using them for dyeing!!
We also use large tray like pans for inside the oven and plastic bowls with clingfilm wrap for smaller batches of hand painted yarns, though these do not go in the oven or on the hob.
Spoons! I have a variety!! Wooden for stirring the dye pans, teaspoons for measuring out dry dye stuffs and dessert sized spoons for hand painting smaller batches of yarns.
A heat source! In our case it’s our wood fired Esse.
But for the clingfilm wrapped ones a microwave will fix the dyes too!!
And that is about it other than a huge collection of glass jars for mixing dyestuffs and colours in!!
What do you or have you used to dye yarns??