  We show that Kauffman brackets of colored framed graphs (also known as
quantum spin networks) can be renormalized to a Laurent polynomial with integer
coefficients by multiplying it by a coefficient which is a product of quantum
factorials depending only on the abstract combinatorial structure of the graph.
Then we compare the shadow-state sums and the state-sums based on $R$-matrices
and Clebsch-Gordan symbols, reprove their equivalence and comment on the
integrality of the weight of the states. We also provide short proofs of most
of the standard identities satisfied by quantum $6j$-symbols of $U_q(sl_2)$.
