What materials are used for a photo tip-in?

I'm doing a hardcover with a pearl linen case and a tip-in photo, what stock does that print on?

We print the tip-in artwork on 100 lb. uncoated white stock, then apply lay-flat film lamination. The lamination choices are gloss, matte, and soft-touch matte.

Your tip-in quote will include at least one foil stamp—we stamp/deboss the area we will be adhering the tip-in photo.