Interior view of text room through window showing technician testing surface drying rates of artists' oil paints with the sand testing machine - DPLA - 4111f73fe60cd9eb73e754974eef5feb

Title from item.; Additional information on back of item: Interior view of text room through window showing technician testing surface drying rates of artists' oil paints with the sand testing machine. To the right of the machine are two rows of panels. Beside these is the pressure testing device used for testing film drying rates. On the wall is the humidity and temperature control apparatus. WPA Federal Art Project, Massachusetts. Photograph courtesy of WPA, Federal Art Project.; Date supplied by curator.; Federal Art Project, Work Projects Administration for Massachusetts, Federal Works Agency.; This date is inferred.