What do these changes mean for the future of chamber music? With the technological advances have come questions of aesthetics and sociological changes in music, writes analyst Baron.
Grades to leather are given by either the manufacturer OR the store that is selling it. If the manufacturer has applied a grading system, they are using the numbers/letters to tell you either a) what type of leather was used or b) how the leather was finished or a combination of the two.
It is used to indicate the relative hardness of a grinding wheel. Grade or hardness refers to the amount of bonding material used in the wheel, not to the hardness of the abrasive. The range used to indicate grade is A to Z, with A representing maximum softness and Z maximum hardness.