100gsm Yupo paper is the most economical and cheapest at Artworx art and craft supplies, we have the best Yupo paper and watercolour paper. 650x910mm 100gsm Yupo paper can be washed if anything water-based is applied, to stop artwork scratching off or being damaged seal Yupo paper with Krylon or Kamar Varnish this is the best sealing spray for alcohol ink.