19 mil, 450gsm poly-cotton fine art canvas. Archival Certified, OBA-free. With eye-popping color gamut and dmax coupled with critical archival certification, it sets a new standard of exceptionalism in fine art and photographic printmaking. The award-winning Lyve™ Canvas is a 19 mil bright white, consistent poly-cotton blend matte canvas using an acid-free, neutral pH coating. Unlike 99% of available fine art canvas products on the market today (for giclee printing), this is an optical brightener additive-free (i.e No OBA’s are used in this product) and fluorescent whitening agent-free canvas.