Glossy paper reflects more directional light and typically gives photographs strong contrast and colour saturation. Matte paper scatters reflections, producing a quieter surface that can be easier to read under bright lighting. Both descriptions cover a range of coated and uncoated products.
Appearance is only one variable
Gloss can emphasise sharp product imagery and deep dark tones, but fingerprints and glare may be more visible. Matte surfaces often feel restrained and allow text to remain comfortable across larger areas. Some matte coatings can burnish when rubbed, creating local shiny marks.
Ink holdout, drying, folding and lamination vary by exact grade. A high-bulk matte sheet may behave very differently from a dense silk-coated stock even at the same basis weight.
Compare printed samples
Review the most demanding page on both finishes, including dark solids, fine text and skin tones. Fold and handle the proof as the reader will. If people must write on the item, test the intended pen. A finish should be specified with the mill and grade name rather than with glossy or matte alone, because those general words do not define surface strength or print performance.