because of its durability and washability.
what are the three standard weights of vinyl wall 1) lightweight (weigh 13 ounces) 2) medium weight (weigh 16 ounces per
coverings yard) 3) heavyweight (w. 22 ounces)
what are the three types of vinyl wall coverings cloth-backed vinyls, paper-backed vinyls and vinyl coated papers.
what is a bolt roll of wallpaper
when were wallcoverings first produce in china as early as 200 B.C.
what is the paper stock of wallpapers made of? cellulose material processed through wood pulp on a standard paper-
making machine
what is a single roll of wallcovering materially u.s : 36 square feet euro: 28 square feet
usually contained in?
,what is an alkyd? an oil synthesized from organic sources such as plant fiber,
hydrocarbons, and petroleum-based chemicals.
what is an additive? a substance added to a coating material to adjust, enhance or improve
emulsion, suspension, drying, application, weathering, and other
properties.
how can mildew growth be stopped? by washing infected area with a solution of bleach, trisodium phosphate
(detergent), and water, followed rinse with clear water.
what is efforescence? caused by moisture or water entering surface of masonry. as moisture
enters, water soluble salts are brought to surface and as water
evaporates, these salts are deposited on the surface as a white salty
material.
, how to remove efflorescence if minor: remove the surface deposit by scraping or wire brushing and
washing the infected area with mild detergent. if severe: require
extensive construction repairs to prevent entry of water into masonry
surface, after repairs made, surface washed with any one of these
solutions: trisodium phloride (TSP), muriatic acid, hydrochloric acid.
all concrete floors under two years old or smooth acid etched before painting. the etching action provides adhesion and at
troweled should be what? the same time neutralizes the alkalinity of the surface. etched with
solution of one part hydrochloric acidand three parts water with a stiff
fiber brush. allow acid the remain on surface until it stops bubbling, then
flush the surface with generous amounts of water.
what will happen when paint is applied over a paint will bleed through and discolour the paint
bleeding type stain?
how can oil and grease be removed from new wiping the surface with mineral spirits
wood?