A colored stock will change an ink's color. Four-color photos are best printed on coated stock. A matte stock can scuff on inserting machines. It's best to determine the purpose and function of each piece in determining stock. You also have to consider the extent to which different stock can be folded or perforated.
Folds work best when either scored first or lightly perforated along the paper's grain direction.
Sometimes, perforations made on press can become too severe for the paper stock to withstand and can break during subsequent personalization or other finishing processes. Again, determine the piece's function, keeping these points in mind. If you decide to personalize any of your components, determine which types of personalization you want to use and which is cost-effective. Technology has given us some wonderful options, and it's good to be aware of all your choices before you decide. Make sure that your paper stock is compatible with your personalization method.