For this article, “terped” refers to the addition of Tea Tree essential oil, which has 40% terpineol.
I prepared henna paste every day for 10 days prior to the henna conference to test the dye release and demise curve of terped paste.
Each morning I mixed Jamila henna powder with lemon juice. The Jamila was all from the same harvest, the summer harvest, and had been stored for 7 months in my freezer, boxed and wrapped in plastic. I started with 25 g of Jamila and added enough bottled lemon juice to create a thicker-than-yogurt consistency. The paste was left in a 70F room in a ceramic cup.
24 hours after adding lemon juice, I added more lemon juice until the paste was stirred up yogurt consistency. Then I added 20 drops of Tea Tree oil to the paste and stirred it in. I put the paste into plastic bags, squeezed out the air, and wrapped the bags in aluminum foil. I dated each bag. I then put the bags in the refrigerator, at about 40F.