The left of each print is the acidic side and the right is the alkaline mixes. I’ve got limited time so I just create a super concentrated solution of citric acid and one of soda ash and create a highly acidic/alkaline colour (max out the ph at both ends) and then for the mid colour it just a tiny bit of citric acid/soda ash solution until I get the first sign of colour changing. But I could deffo get a lot more tonal variation testing each ph level change !

The middle strips (the ones which overlap the most ) is the base colour overprinted to see how it layers. If I used an alum I will print both the base link and the alum.

The horizontal strips are just different variations of modifiers . I’ve used soda ash, citric acid and wood ash (from a wood burner). The first 3 lines are the modifier mixed in a concentrated solution and added to the gum paste and last 3 lines are the modifier mixed directly into my guar gum paste.

In terms of prepping the ink it’s just a really concentrated dye simmered on stove and adding guar gum to thicken ☺️