Perhaps one could try using carbonated water in their mix.
Posted by Faery Ring on June 7, 2002 at 19:19:00:
it might be referring to displacing the reactive oxygen in the air
with a non-reactive noble gas. Sort of like when restaurants store
an open bottle of wine by pumping xenon or some other non-reactive
gas into the bottle. The simplest think I can think of is to blow
into the container and displacing the air with carbon dioxide in your
breath. Maybe using carbonated water would help. Carbonated water
has carbon dioxide dissolved in the water and is slightly acidic.
Also you could try putting your paste in an airtight container. I
have found that the big 2 ounce (60 ml) syringes are great for
storing henna paste. The plastic is thicker on the syringes than a
squeeze bottle and seems to keep the oxygen out better.
I just used some henna paste that I stored in an airtight glass jar
in the freezer for 5 days. The stain is still great considering my
henna paste never lasted into the second day if left out at room
temperature and exposed to air.
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