The present invention relates to a loaded latex particle comprising a
latex material made from a mixture represented by formula
(X)m-(Y)n-(Z)o-(W)p, wherein Y is at least one monomer with at least two
ethylenically unsaturated chemical functionalities; Z is at least one
polyethylene glycol macromonomer with an average molecular weight of
between 300 and 10,000; W is an ethylenic monomer different from X, Y, or
Z; and X is at least one water insoluble, alkoxethyl containing monomer;
and m, n, o, and p are the respective weight percentages of each monomer.
The particle may be loaded with a fluorescent dye.