Arches watercolor paper is made the traditional way, using a cylinder mould. This method ensures that the fibers are evenly distributed which makes the paper extremely stable, so it will not warp or stretch when water is applied to it. Arches watercolor paper is made from long, 100Percent cotton fibers, allowing it to absorb a lot of water without warping or causing the colors to bleed. It is sized to the core with natural gelatin, so it can be scratched without tearing or linting. This Internal sizing also prevents paint penetrating into the paper, allowing light to shine through the pigment and reflect off the paper while ensuring durability of the colors. The cold press finish has a light texture and is the most common. It reflects light well, retaining the transparent quality of watercolours. A light grain makes it easier to achieve certain details. All Arches papers are cylinder mould made as they have been for over a century. With long fibers, this thick, stable sheet is beautiful, durable, and resillient. Each sheet of Arches Watercolour paper is tub-sized in a bath of pure natural gelatin and then air dried to add additional strength and durability. No more hassle of trying to achieve the perfect angle while out in the field! With Upsyde's Angle Lifts it allows you to create an angle that makes it easier to view or work on. Upsyde is a modern invention that is easily adjustable to give you the perfect angle and both easy to store and carry wherever you need. Each Upsyde is 2.5 wide with a maximum height of 2-1/4 . They can either be used individually or combined in a stack to lift up 1 more at a time achieving a greater angle to work with. The center employs a special angled grip on the inner sphere. The combination of this grip and using a material with some give allows Upsyde to slidly hold almost any flat item in place for short or long durations of time. Bundle comes with 1 arches watercolor block and a 4-pack of upsyde angle lifts. UPC 703856403796 ASIN B07Q21QQH8 Color Cold Press Brand Name Lassos Boutique Paper Size 16 x 20 inches Unit Count 4 Count Item Weight 1 Pounds Sheet Count 5 Manufacturer Jerrys Artarama Paper Finish Watercolor Paper Weight 110 Material Type Paper Warranty Description 90 Days Recommended Uses For Product Watercolor