undercoat

Từ điển LongMan Dictionary

un‧der‧coat/ˈʌndəkəʊt $ -dərkoʊt/ noun [COUNTABLE]
a layer of paint that you put onto a surface before you put the final layer on ⇨ topcoat

noun
EXAMPLES FROM CORPUS
▪ After priming, the correct colour undercoat is applied, followed by two coats of gloss.
▪ Amount of undercoat is influenced by climatic conditions.
▪ But it's rather interesting - it's brown undercoat.
▪ Hammerite is a unique paint: it dries to a very hard finish, and needs no primer or undercoat.
▪ In some places the reddish undercoat of the frame shows through the gold moulding, echoing the reds in the picture.
▪ It can be used on wood and metal, and needs no primer or undercoat.
▪ The undercoat is grey or black.
▪ Yellow ochre is a colour I often use for both undercoats and overpainting, having a good semi-transparent quality.

• Từ đồng nghĩa / Synonyms:
  underfur, flat coat, ground, primer, priming, primer coat, priming coat, underseal, prime