Since it is difficult to form intricate patterns
from coarse crushed leaves, henna is
commonly traded as a powder made by drying,
milling and sifting the leaves. The dry powder
is mixed with one of a number of liquids,
including water, lemon juice, or strong tea, and
other ingredients, depending on the tradition.
Many artists use sugar or molasses in the
paste to improve consistency and keep it stuck
to the skin better.
The henna mix must rest for
1 to 48 hours before use, to release the
lawsone from the leaf matter. The timing
depends on the crop of henna being used.
Essential oils with high levels of monoterpene
alcohols, such as tea tree , cajeput, or lavender,
will improve skin stain characteristics.
Other
essential oils, such as eucalyptus and clove,
are also useful but are too irritating and
should not be used on skin.
