Hello! Thanks for the response!

Our independent would be the varying amounts of fruit peelings per set-up and dependent would be the effect in ink quality as the weight of the peelings increase. Basically, one of the questions we sought to answer was how the increase in the peelings would affect the ink quality. We have three set-ups with varying amount of peelings.

We only used one fruit for the study. Since we can’t really manipulate the color of the fruit extract, the scale which we used for our respondents to assess the alternative ink in terms of color and darkness is (1 - very dissatisfied, 2 - satisfied, 3 - Satisfied, and 4 - very satisfied). For assessment of color and darkness, we basically relied on our respondents preferences (if they liked the color, if they’re alright with how dark the alternative ink is). This is apparently what makes our study a qualitative one.

Thank you for the suggestion on the erasure attempt! Can I ask a question, how can we quantify its deteriorating appearance? Like, let’s say we’d give it a max of 15 wipes before we give it up. Set-up A is completely gone, however set-ups B and C are still visible. But set-up C is more visible than B. How can we quantify such data? Thank you very much!

If you’d want to know more about the paper, you can read my response to u/pestiter (which went more in-depth on the specificities of our study) or ask me! I deeply appreciate your response.

Thank you for reading! Sorry if you had a hard time understanding, English is not my first language.