The phrase "black frame" refers to a picture frame that is completely black in color, with no design or pattern on it.
Sentences with «black frame»
Presented in black frame with conservation mount and UV acrylic. (barnebys.com)
An architectural tub is the centerpiece of this master bath / Black and white photos in black frames contrast against a palette of whites and creams. (hgtv.com)
Some changes are in store around back too, starting with the thick black frame of the tailgate. (topspeed.com)