Although the chemicals and
products used in the batik process are advertised as being fairly
benign, my own frequent and careless exposure over the years have
severely limited my ability to work in the medium for any length of
time before it takes its toll on my health. Although they probably
would not pose health risks to most people, I would strongly
recommend using every available precaution when mixing dyes, soda
ash, and breathing wax fumes. This includes a Niosh approved
respirator (most sources for fiber reactive dyes should carry proper
respirators), goggles, and rubber gloves to avoid contact with skin.
Keep your work area clean! I have been using soy wax instead of
paraffin lately and find it to be less of a problem for my lungs, I
think partially due to the fact that it has such a low melt point and
does not give off the nasty fumes that paraffin does.