By American Assoc. of Textile Chemists and Colorists
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Extra info for AATCC Technical Manual
Used with discrimination and in combination with other tests, cross-sections and dye tests may sometimes be helpful in narrowing down the number of possibilities. Metallic fibers have a distinctive shiny appearance, but a shiny residue may not indicate a metallic fiber. Using a transmitted light microscope at 5x, 10x and 20x magnification powers will not reveal diffraction, interference and gloss effects that can deceptively appear to be metallic in nature. Chemical (colorimetric) and/or instrumental (Atomic Absorption Spectrophotometric) analyses should be performed to confirm their presence.
5). 3. Terminology 5. 1 For definitions of technical terms, refer to the Glossary of AATCC Standard Terminology in this TECHNICAL MANUAL. 1 Compound microscope with matched objectives and eye pieces to achieve magnifications of 100-500X and equipped with a polarizer and analyzer. 2 Glass slides and cover glasses. 3 Dissection needles. 4 Scissors (small) and tweezers (fine). 2. Use and Limitations 4. 5 Cross-sectioning device of one type such as listed below. ) diameter holes. ) diameter. 1). 6 Razor blades, sharp, thin, single edge or double edge with holder.
1 Place a small sample of the fiber on a glass slide. 55. 2 Insert the polarizer into the substage of the microscope to provide light polarized in the 6-12 o’clock direction. Align the long dimension of a fiber in the same direction. Close the diaphragm of the substage condenser so as to provide axial illumination. 3 Focus carefully on the outlines of the fiber. With the fine adjustment, raise the focus to just above the top of the fiber. If the fiber is roughly a cylinder, it will act like a lens.
AATCC Technical Manual by American Assoc. of Textile Chemists and Colorists