Assertion: porcelain's color | /r/HasProperty | masked with opaque layer
Facets:
value: for porcelain
type: PURPOSE
value: to make
type: PURPOSE
value: for ceramic
type: PURPOSE
Source sentences:
text: For ceramic fused to metal restorations, the black color of metal is first masked with an opaque layer giving it a shade of white before consecutive layers are built up.
text: For porcelain fused to metal, the black color of metal is first masked with an opaque layer to make it a shade of white and then consecutive layers are built up.