Record inner sleeves serve to protect vinyl records from dust, scratches, and other damages.
The black paper serves multiple functions. Firstly, it shields the record from light, as direct sunlight can damage the vinyl surface. Secondly, it prevents dust particles from reaching the record and settling into the grooves. This is important since dust can impair sound quality.
Additionally, the smooth plastic lining reduces the risk of scratches when inserting or removing the record from the sleeve.
Together, the black paper and plastic lining offer a good combination of protection and functionality for vinyl records. They help extend the lifespan of the records and maintain optimal sound quality.