Day 2 of fermenting oak galls.

About as dark as tea after one day.

Here's yesterday's photo for comparison.

Here's the recipe for this batch again:

Oak galls - 4 parts by weight (In this case 4 ounces)

Iron Sulfate - 2 parts (2 ounces)

Gum Arabic - 1 part (1 ounce)

Water - 32 parts (32 ounces, or about 4 cups)

None of these measurements are exact. I'm using a 100g package of oak galls which is 3.527 ounces. I'll probably use a tablespoon to measure the iron sulfate & gum arabic.