Here distilled water comes in 2 liters bottles, I add 1 drop of methylene blue solution 1%, now I have 2 liters of methylene blue at the right concentration to be used as topical.
Pour the desired amount in a container (60ml will last about 30 days at twice a day use) and leave alone the rest in its bottle for later use.
Add to the 60ml solution 0.6g hyaluronic acid powder in order to obtain a hyaluronic acid gel or about one scarce tea spoon of granular soy lecithin and blend with an immersion blender for about 2 minutes in order to get a liposomal cream.
The amount of granular soy lecithin doesn't have to be exact, less yields a more watery cream while more yields a denser cream, if too watery you can add more lecithin and blend again, if too dense add more methylene blue solution and blend again.
If you don't care about liposomes or don't have an immersion blender just stir and wait until the granules are fully melted (it might take a while).
My suggestion is to aim for a consistency just dense enough to not be too runny for an easy application, too dense is kind of messy and takes longer to get absorbed.