Lamp light is 100% cotton and is the finest watercolor paper produced in Japan.
Lamplight is the highest quality watercolor paper produced in Japan that boasts a high balance of adequate balance with its rich colorization of gentle warm white and cotton pulp.
100% cotton has a medium skin and a strong repel of paint and leaves the pigment left on the surface for better color development and easier control of on-screen paint such as blurring, smudging or wiping off.
This block is perfect for drawing with lots of water, and it can be removed once you are finished drawing.
(From Amazon.co.jp)