Definitions for "Multigrade"
Photographic B&W paper that provides all the different grades of contrast from one box. Invented by Ilford in the 1950's, but versions are now manufactured by all the major makers. (see Contrast grade paper) back to the top
Lubricating oil whose viscosity covers that of several single grade oils, making it suitable for use over a wider range of operating conditions. eedle bearing - Type of bearing in which needle or cone-shaped rollers are used around the circumference to reduce friction.