peppermint tea black and white developer

peppermint tea. first experiments using polyphenol chemistry with ilford multi grade resin coated paper. the developer uses peppermint tea, vitamin c and washing soda. an unexpected combination for proponents of analogue photography. photowork by, #untitled, #analoguephotography, #polyphenols, #pepperminttea, #naturalchemistry, #blackbox, #darkroomphotography, #henryseaton,

peppermint tea. first experiments using polyphenol chemistry with ilford multi-grade resin coated paper. the above image by @gseatonart uses tea leaves, vitamin C, and washing soda.

all information on formula and developing times was extracted from an article by daniel keating 35mmc

‘as we see from the table above coffee is ranked #36 and cloves #1. peppermint tea #2. one of the standard caffenol formulas calls for 15g sodium carbonate, 2.5g ascorbic and 10g instant coffee for 300ml of water for a single roll.

so how much clove might be needed? If we divide the 214mg/100g content of the coffee into the 15,188 of the clove then we might need 1/70 the amount of clove to coffee. keep in mind that using home methods of hot water steeping/making tea of the desired substance we cannot extract EVERY drop of the goods from the target item. 10g of coffee divided by 70 is roughly 0.15g of cloves. I made an educated guess and used 0.2g cloves , and the same 15g carbonate and 2.5g ascorbic acid (vitamin c) with the 12 min caffenol time and achieved this:

the amounts are as follows 10g coffee 5g sodium carbonate (washing soda) 2.5g ascorbic acid (vitamin C) ‘

we worked out from this the formula for peppermint tea
therefor using peppermint tea leaves 0.18g peppermint say .2g sodium carbonate 2.5g vit C

double amounts for 600mi water
i guess at 20ºC–30ºC
first developer use: 12 mini@ 26ºC; second use: 16min@ 26ºC: third use: 22min @ 26ºC: fourth use: 30min @ 30ºC

plant based formulations: three extraction methods were used:

  • boiling the plant source in water for 30 minutes;
  • steeping the plant in hot water for a day;
  • steeping the plant in hot water and alcohol for a day.

the differences across the results of these three methods were imperceptible, so it was decided to steep the plants in hot water for a day, as that was the easiest method to carry out.
the method is simple. the dry leaf of the plant is placed in a glass or plastic jar that can tolerate hot water. add 650 ml of boiling water, and leave for one day. then, filter the liquid ( with a paper or cloth filter) to remove the rough tea and plant leaves, sticks, etc. the resulting amount of liquid might be around 500 ml.