<prompt> the staining technique seen above is used to stain ?bonecollagenskin tissuecailage  <response>: MASSON;S ;TRICHROME STAIN PRINCIPLE: Smaller dye molecule will penetrate and stain a tissue element but when ever the larger molecule can penetrate the same element the smaller molecule is replaced by it THE THREE DYES trichrome Aniline Blue stains collagen and mucus to blue or blue green Beibrich Scarlet stains cytoplasm, muscle and keratin to red Weige;s Iron Hematoxylin stains nuclei blue to black REF : ROBBINS 10TH ED 