Wash the avocado skin and pits very well. Make sure to get off as much leftover green flesh as possible. (of course this is after you’ve eaten the lovely avocado!)
Scrub them if they are very sticky. Remove any mouldy sections.
Set aside to dry or dab dry.
Weigh the pits and peels
This can be useful if you want to repeat the recipe many times and record your results/variances.
You can also just use just pits, or just peel!
The pits will be too hard at this stage to change, but you can prepare the avocado peel in different ways. Each of the following options should give a similar result (but the preparation beforehand of the peel in different ways will allow you to use it in a variety of ways afterwards should you want to try it in another recipes)
Use the skin in large whole pieces
Tear or chop it up into smaller pieces
Finely chop it in a blender
Add the peel & pip into the saucepan
Add the Water
This can be cold or preheated; either may change the result of the final mixture.
Cover with a lid and cook the water, peel and pip in the pan for 10 minutes.
Try not to remove the lid if possible.
Strain or sieve the mixture. The colour of the onion will depending on the kind of colour created.
You can use the avocado dye straight away
You could also store this in a clean jar or glass.
You can keep this in the fridge also, if you don’t want to use it straight away.
You can even freeze the mixture once it is cool.
You can then use this avocado dye mixture in a biomaterial recipe, in addition or replacing part of the water in the recipe.
Try to vary the amount of peels or water in the recipe to get a weaker or more concentrated solution.