http://help.thenightsky.io/about-the-product/paper-quality

Our Enhanced Matte Art (EMA) substrate is a premium-quality heavyweight paper with a gently textured surface. This 200gsm museum-quality paper is extremely consistent and works perfectly with large, full colour graphics, photography and illustrations.
Sourced exclusively from Hahnemühle, the world’s most famous papermaker and supplied directly to all partner labs, our fine art paper provides exceptional tonality and renders sharp details with a consistent flatness.
All papers are designed for archival storage and are acid-free, making them highly resistant to ageing. The paper is also lignin-free, ensuring it will not yellow with age.
Our papers are independently tested to be light resistant for at least 100 years.

Technical details

* 200gsm – Alpha-Cellulose

* Warmtone, fine smooth finish.
* Compatible with pigmented and dye inks
* Low OBA Content
* Water resistant, fast drying
* Calcium carbonate buffered

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