The subject of the standard is the B-80 piano booster, which is a mixture of: Pianofor B-100 (benzene phosphate hydrazide) and phlegmatizer (paraffin oil) c Pianofor B-80 has:
PN BN 6065-02-1963 history
1963PN BN 6065-02-1963 Auxiliary materials for man-made products. Pianofor B-80