Start with 1 part of dye and 1 part water (equal parts) e.g. 1 kg of each. Mix this well, then you can dilute it further with water, pay attention, the more water the more transparant the dye becomes. It is advisable to do a test beforehand to find ...
Yes , in flower food is put a bacteria killer , which help to keep the water clear. https://centimo.nl/product/postharvest-preservation-liquid-anti-bacteria/%E2%80%8B
It is specially developed to all kind of bacteria in the absorbable flower dye solution. The Centimo post harvest works longer and better than any Chrysal/ floral-life product . So you can use it on every flowers as a post-harvest product.