Reply to comment on “which fraction of stone wool fibre surface remains uncoated by binder? A detailed analysis by time-of-flight secondary ion mass spectrometry and X-ray photoelectron spectroscopy” by Hirth <i>et al.</i>, 2021, <i>RSC Adv.</i>, 11, 39545, DOI: 10.1039/d1ra06251d”
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