G. thinly Slice by a microtome. Reflectance is made use of to research good samples in which the IR gentle is reflected from the sample area and afterwards detected. It also can review very slender samples which might be places over a reflective substrate, including skinny tissues or coatings. See https://irimaging73826.aboutyoublog.com/28241270/ir-imaging-no-further-a-mystery