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Glossary of textile decoration

UNDERCURTAINS

Halfway between a curtain and a net curtain, an undercurtain is typically seethrough and coloured. Whether open, hanging freely or held by a tie-back, it is used as gathered lining for a heavyweight curtain. Ideally made with silk shantung, it fills the room it is in with forevershifting light when closed. Pay attention when you choose colours: natural shades are the best option, as green or blue shades dramatically alter natural light.

UNDERLAY

Refers to a thin layer of cushioning made of materials such as sponge rubber, foam, felt, or crumb rubber; this material is laid beneath carpeting to provide comfort underfoot, to reduce wear on the carpet, and to provide insulation against sound, moisture, and heat.

UNION DYEING

A method used to evenly dye textile, so a whole piece of fabric looks absolutely colour homogeneous. Dyeing defect: the dye is not evenly distributed on the surface of the fabric, which features variations of a same colour.

UNPRIMED

Refers to a support, whether dyed or not, which has not undergone any chemical or mechanical treatment or process.