We take every measure we can to ensure our prints will last a lifetime. All our luster/semi-gloss paper is acid-free, with the exception of trace amounts in the coating which is sufficient to prevent fading or yellowing.
Our mat boards are also acid-free; as such, they are priced at a premium. To keep mat pricing affordable, we do all of our mat cutting in-house. We also mount the mats with acid free glue and/or tape. We only mat to standard sizes.