Which painting plants have a relatively large yield of dye, and are therefore suited for use on a larger scale?
How can waste of the food industry be used to extract natural dye?
Which applications of dye plants are of interest for society?
Which binders are best suited for different printing techniques and to what extent does this depend on the used colourants/pigments?
Which extraction methods are (per plants) most beneficial to obtain as much dye as possible?
Which techniques (like changing the pH) are there to influnece the intensity of natural colourants?
What is the function of colourants (for instance, in the roots of) plants?
Why does the amount of colourant in plants change over time?
How do the surroundings (soil, other plants) influnece the creation of colourants in the plant?
What does an accumulator like Lycopodium (ground pine) do to the structure of a colourant?
Which colourants in plants benefit from the use of natural deep eutectic solvents?
What is the chemical background of the change of natural colourants, by adding tannin or another natural flux material, as opposed to metal salts?
What is the dominant factor for the degradation of alkannin (from the plant Alkanna tinctoria)?
How does the harvesting method influence the quality of the extracted colourants?
Are there factors during the extraction process that influence the nuance of the final colourant?