Furthermore, there is another type of reaction even
more serious, that sometimes develops on the hands of
the surgeon or cast-room technician who uses the prod
uct repeatedly—a reaction that may be related to the
amino groups in the resin. In spite of the very desirable
strength and water-resistant properties of such casts,
these reactions have markedly restricted their use. It may
be further pointed out that recently plaster of Paris
bandages have been used to make an interesting and
extensive variety of art objects.