dear mrs, the reaction of ur skin is normal thing to different kinds of floral water
it is not bcs of preservatives, just an action of water type
i've tried a lot of kinds of pure floral water w/o any additions and can tell you, for example, my skin becomes red with lavender water a bit, rosemary and lime (especially from lime) a lot; the redness is lasting just a few minutes (and this is good blood circulation, guess and hope)
and i have no problem and not sensitive skin*
my friend had got the skin reaction on others waters, such carrot and smth else, but i didn't have any redness bcs of them
so, it was just ur personal reaction to certain type of floral water and it is normal)
cheers

unfortunately i have allergy for this cornflower water, after using it my face is red and irritated, i think it contains SODIUM BENZOATE and POTASSIUM SORBATE's in it's composition