base-coat

/ˈbeɪs ˌkəʊt/ (bre, ipa) · /ˈbeɪs ˌkoʊt/ (ame, ipa)

base-coat — noun

1. The first layer of paint or similar substance that you put onto a wall, piece of

1.名詞B1
釋義

The first layer of paint or similar substance that you put onto a wall, piece of wood, or other surface before adding the final layers. A good base coat covers the surface evenly and helps the top colours look their best.

例句

Jabari applied a white base coat to the wall before painting it blue.

applied + a base coat + to [surface]

The shop assistant said I should use a base coat for better colour results.

use a base coat for [purpose]

同義詞
  • undercoat

    very similar meaning; 'undercoat' is more common in British English for paint

  • primer

    primer seals the surface, while base coat is the first colour layer; the terms overlap in casual use

反義詞
  • top coat

    the final layer of paint applied over the base coat

  • finish coat

    the last visible layer in painting or plastering

文法句型

base coat + of [paint type]

apply + a base coat

用法筆記

Often used with 'apply', 'use', or 'put on'. The base coat is not the same as primer — primer seals the surface, while a base coat is the first colour layer.

常見錯誤

❌I painted the base coat as the final step.
✅I painted the top coat as the final step.
💡The base coat is the first layer, not the last.
❌I bought a base coat for sealing the wood.' (when you mean primer)
✅I bought a primer for sealing the wood.
💡Primer seals the surface; a base coat is the first paint layer.

2. In plastering, the lower layers of plaster that go onto a wall before the smooth

2.名詞C1
釋義

In plastering, the lower layers of plaster that go onto a wall before the smooth final layer. A base coat may be a single rough layer, or two layers called the scratch coat and the brown coat. These layers make the wall flat and strong.

例句

The builder finished the base coat of plaster and waited for it to harden.

Cyrus checked that the base coat was dry enough before applying the finish layer.

base coat + of plaster; finish layer

同義詞
  • scratch coat

    only the first of the two base-coat layers; not the full base coat

  • brown coat

    only the second of the two base-coat layers; not the full base coat

  • rough coat

    informal term for the base coat before smoothing

反義詞
  • finish coat

    the smooth final layer of plaster applied over the base coat

  • skim coat

    a very thin finish layer, typically the last step

文法句型

base coat + of plaster

scratch coat + brown coat

用法筆記

Technical term used in construction and plastering. The plural 'base coats' is rare even in technical writing — usually treated as uncountable or singular.

常見錯誤

❌The base coat of plaster is the smooth final layer.
✅The base coat of plaster is the layer under the final smooth finish.
💡The base coat supports the finish coat; it is not the top layer.