 | Polyacrylamide will form a clear film upon drying. There could be
slight traces of yellowness, or some haziness, but it would still be
regarded as clear.
Once the material is crosslinked, it will still absorb water, but it
will be a non-soluble gel. Non-crosslinked material will be soluble
and can be washed away.
Polyacrylamide in water will actually be a solution, not an emulsion.
An emulsion is a stable mixture of non-soluble droplets in water. They
appear as a hazy white liquid, much like milk, also an example of an
emulsion.
Adding a pigment successfully will depend on the exact nature of the
pigment. Possibilities: a) emulsify it using the polymer as the
emulisifier, b)disperse the pigment in alcohol, which could then be
added to the water/polymer
Acrylamide is considered a possible human carcinogen
http://physchem.ox.ac.uk/MSDS/AC/acrylamide.html so I can't recommend
that you use it given your limited background in chemistry. That is why
I suggested the substituted acrylamide, even if it is more expensive.
John
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