FWIW this saftey sheet is typical of all brands (expiry date/shelf life mentioned under 'injury caused by product breakage')... http://www.klingspor.ca/html/pdf/pdf_1/18_ds_fepa_englisch.pdf
Like everyone else i've only managed to break discs by being hambfisted, doesn't mean that they can't become more brittle/delicate with age/poor storage though...
Like everyone else i've only managed to break discs by being hambfisted, doesn't mean that they can't become more brittle/delicate with age/poor storage though...