Sorry for the very late reply! If the packaging will be folded many times it is convenient to use a cardboard lighter than 200gr. (I discovered this the hard way hehe) also try to not use papers with layers (coated) the fibres tend to open when you fold them and it will ruin your work.
I do have one question, what weight card do you usually use?
Also, thank you SO MUCH for your comment (:
And you're welcome