âº [ C ] a word or expression that was first used in the US but is now used by people in other countries, especially those where English is spoken:  1 O.K. is an Americanism now used all over the world. 2  He was an immigrant who made it in America; Americanism was his religion.
YUPO is a synthetic paper which is ideal for working with alcohol inks. One of my most favorite surfaces to paint on is YUPO. YUPO is a synthetic paper made from plastic pellets and because of its slick surface, it is ideal for use with alcohol inks. The inks seem to move freely when applied to the YUPO surface.
1 Red litmus paper: It is used to detect basicity. 2  It turns to blue under basic conditions and is unchanged under acidic conditions. 3  Red litmus paper is prepared by the treatment of plain filter paper with a red dye. 4  This red dye is pre-treated with little sulphuric acid and dried in air.