When doing giclée prints, it’s very important to make sure to use quality inks. There are many types of inks, dry-based, mineral, pigmented…
My recommendation is to use the best pigmented inks you can find. It’s useless to invest in an expensive paper, if the ink is going to be altered over time.
Also need to have the option of testing, since there is no general rule in the case of reproductions, and it’s good to see particular colour and paper proofs of each work.
It’s also important to compare the reproductions with the originals to make them as accurate as possible.
All this and many more secrets in my blog: pakocampo.com/giclee-prints-step-by-step/