More on Cotton Paper: Artists work on paper with a multitude of different media including graphite, charcoal, watercolour, inks, coloured pencil and pastel. Artist paper is acid free which helps to optimise the structure of the paper, minimising deterioration over time including fading, yellowing, or even preventing the paper from falling apart. Cotton papers are considered the highest quality papers as they are acid free, conservation quality and made of the strongest fibres. This is important to many artists as it allows them to erase repeatedly, lift colour with ease, and scrub and scratch, without holes tears and breaks appearing in the paper. Cotton papers are more expensive than the alternative wood-free paper, often a mix of cotton and lignin free cellulose fibres.