1940-1949, light green dress with grape motif, rayon fabric

Source: The Ohio State University, http://fashion2fiber.osu.edu/items/show/1748

Note: Identification of fiber content is not achievable by a single image alone, It is essential to look at the accumulation of evidence provided by a series of images , each employing different microscopic techniques. The following set of images also shows the use of microsolubility as a confirmatory test.

001.1986.111.29.08-22-2014.BF.200X.MM.rayonUNK.dressfabricwarp

Source manufactured Accession Number HCT.1986.111.29 Title Rayon fiber, bright field, 200X Image Identification information 001.1986.111.29.08-22-2014.BF.200X.MM.rayonUNK.dressfabricwarp Image capture digital Date of image capture 08/22/14 Microscopist K. Jakes Microscope Zeiss Axioplan Mounting agent and RI Meltmount RI 1.539 Microscopic technique Brightfield Fiber size medium fiber diameter Striations striations apparent delustrant present comments confirmation as rayon not possible from single image

001.1986.111.29.08-22-2014.BF.200X.MM.rayonUNK.greenfabricwarp

Source manufactured Accession Number HCT.1986.111.29 Title rayon fiber, Brightfield, 200X Image Identification information 001.1986.111.29.08-22-2014.BF.200X.MM.rayonUNK.greenfabricwarp Image capture digital Date of image capture 08/22/14 Microscopist K. Jakes Microscope Zeiss Axioplan Mounting agent and RI Meltmount RI 1.539 Microscopic technique Brightfield Fiber size medium fiber diameter Striations striations apparent delustrant present

002.1986.111.29.08-22-2014.POL.200X.MM.rayonUNK.dressfabricwarp

Source manufactured Accession Number HCT.1986.111.29 Title Rayon fiber, polarized light, 200X Image Identification information 002.1986.111.29.08-22-2014.POL.200X.MM.rayonUNK.dressfabricwarp Image capture digital Date of image capture 08/22/14 Microscopist K. Jakes Microscope Zeiss Axioplan Mounting agent and RI Meltmount RI 1.539 Microscopic technique Polarized light Fiber size medium fiber diameter Striations apparent delustrant present Comments low orders of color under polarized light

002.1986.111.29.08-22-2014.POL.200X.MM.rayonUNK.greenfabricwarp

Source manufactured Accession Number HCT.1986.111.29 Title Rayon fiber, polarized light, 200X Image Identification information 002.1986.111.29.08-22-2014.POL.200X.MM.rayonUNK.greenfabricwarp Image capture digital Date of image capture 08/22/14 Microscopist K. Jakes Microscope Zeiss Axioplan Mounting agent and RI Meltmount RI 1.539 Microscopic technique Polarized light Fiber size medium fiber diameter Striations apparent delustrant present Comments low orders of color under polarized light

003.1986.111.29.08-22-2014.DIC..200X.MM.rayonUNK.dressfabricwarp

Source manufactured Accession Number HCT.1986.111.29 Title Rayon fiber, differential interference contrast, 200X Image Identification information 003.1986.111.29.08-22-2014.DIC..200X.MM.rayonUNK.dressfabricwarp Image capture digital Date of image capture 08/22/2014 Microscopist K. Jakes Microscope Zeiss Axioplan Mounting agent and RI Meltmount RI 1.539 Microscopic technique Differential interference contrast Fiber size medium fiber diameter Striations present Comments low orders of color

003.1986.111.29.08-22-2014.DIC..200X.MM.rayonUNK.greenfabricwarp

Source manufactured Accession Number HCT.1986.111.29 Title Rayon fiber, differential interference contrast, 200X Image Identification information 003.1986.111.29.08-22-2014.DIC..200X.MM.rayonUNK.greenfabricwarp Image capture digital Date of image capture 08/22/2014 Microscopist K. Jakes Microscope Zeiss Axioplan Mounting agent and RI Meltmount RI 1.539 Microscopic technique Differential interference contrast Fiber size medium fiber diameter Striations present Comments low orders of color

004.1986.111.29.08-22-2014.POLFOR.200X.MM.rayonUNK.greenfabricwarp

Source manufactured Accession Number HCT.1986.111.29 Title Rayon fiber, Polarized light, first order red added, 200X Image Identification information 004.1986.111.29.08-22-2014.POLFOR.200X.MM.rayonUNK.greenfabricwarp Image capture digital Date of image capture 08/22/2014 Microscopist K. Jakes Microscope Zeiss Axioplan Mounting agent and RI Meltmount RI 1.539 Microscopic technique Polarized light, first order red added Fiber size medium fiber diameter Striations present Sign of elongation positive sign of elongation

004.1986.111.29.08-22-2014.POLFOR.200X.MM.rayonUNK.dressfabricwarp

Source manufactured Accession Number HCT.1986.111.29 Title Rayon fiber, polarized light, first order red added, 200X Image Identification information 004.1986.111.29.08-22-2014.POLFOR.200X.MM.rayonUNK.dressfabricwarp Image capture digital Date of image capture 08/22/2014 Microscopist K. Jakes Microscope Zeiss Axioplan Mounting agent and RI Meltmount RI 1.539 Microscopic technique Polarized light, first order red added Fiber size medium fiber diameter Striations difficult to see Sign of elongation positive sign of elongation. Subtraction color achieved when fiber is oriented perpendicular to the optic axis of the first order red plate.

005.1986.111.29.08-22-2014.POLFOR.200X.MM.rayonUNK.greenfabricwarp

Source manufactured Accession Number HCT.1986.111.29 Title Rayon fiber, Polarized light, first order red added, 200X Image Identification information 005.1986.111.29.08-22-2014.POLFOR.200X.MM.rayonUNK.greenfabricwarp Image capture digital Date of image capture 08/22/2014 Microscopist K. Jakes Microscope Zeiss Axioplan Mounting agent and RI Meltmount RI 1.539 Microscopic technique Polarized light, first order red added Fiber size medium fiber diameter Striations difficult to see Sign of elongation positive sign of elongation. Addition color achieved when fiber is oriented parallel to optic axis of first order red plate.

006.1986.111.29.08-22-2014.BF.200X.acetone.rayonandcotton.dressfabricwarp

Source manufactured Accession Number HCT.1986.111.29 Title Rayon fiber, brightfield, 200X Image Identification information 006.1986.111.29.08-22-2014.BF.200X.acetone.rayonandcotton.dressfabricwarp Image capture digital Date of image capture 08/22/2014 Microscopist K. Jakes Microscope Zeiss Axioplan Mounting agent and RI Meltmount RI 1.539 Microscopic technique Brightfield Fiber size medium fiber diameter Striations present Comments Fibers were treated with acetone, but did NOT dissolve, therefore shown to be rayon, not acetate. Note although a single fiber appears with a twisting cross section typical of cotton, this is the only cotton which was found in the specimens examined. Presence of a single fiber of cotton is insufficient to support identification of cotton as a component of this fabric, since cotton is ubiquitous.

001.1986.111.29.08-22-2014.BF.200X.MM.rayonUNK.dressfabricweft

Source manufactured Accession Number HCT.1986.111.29 Title Rayon fiber, brightfield, 200X, weft speciment Image Identification information 001.1986.111.29.08-22-2014.BF.200X.MM.rayonUNK.dressfabricweft Image capture digital Date of image capture 08/22/2014 Microscopist K. Jakes Microscope Zeiss Axioplan Mounting agent and RI Meltmount RI 1.539 Microscopic technique Brightfield Fiber size medium fiber diameter Striations present Delustrant delustrant apparent

001.1986.111.29.08-22-2014.BF.200X.MM.rayonUNK.greenfabricweft

Source manufactured Accession Number HCT.1986.111.29 Title Rayon fiber, brightfield, 200X, weft specimen Image Identification information 001.1986.111.29.08-22-2014.BF.200X.MM.rayonUNK.greenfabricweft Image capture digital Date of image capture 08/22/2014 Microscopist K. Jakes Microscope Zeiss Axioplan Mounting agent and RI Meltmount RI 1.539 Microscopic technique Brightfield Fiber size medium fiber diameter Striations present Delustrant delustrant present

002.1986.111.29.08-22-2014.POL.200X.MM.rayonUNK.dressfabricweft

Source manufactured Accession Number HCT.1986.111.29 Title Rayon fiber, polarized light, 200X, weft specimen Image Identification information 002.1986.111.29.08-22-2014.POL.200X.MM.rayonUNK.dressfabricweft Image capture digital Date of image capture 08/22/2014 Microscopist K. Jakes Microscope Zeiss Axioplan Mounting agent and RI Meltmount RI 1.539 Microscopic technique Polarized light Fiber size medium fiber diameter Striations present Comments low orders of color

002.1986.111.29.08-22-2014.POL.200X.MM.rayonUNK.greenfabricweft

Source manufactured Accession Number HCT.1986.111.29 Title Rayon fiber, polarized light, 200X, weft specimen Image Identification information 002.1986.111.29.08-22-2014.POL.200X.MM.rayonUNK.greenfabricweft Image capture digital Date of image capture 08/22/2014 Microscopist K. Jakes Microscope Zeiss Axioplan Mounting agent and RI Meltmount RI 1.539 Microscopic technique Polarized light Fiber size medium fiber diameter Striations present Comments low orders of color

003.1986.111.29.08-22-2014.DIC..200X.MM.rayonUNK.dressfabricweft

Source manufactured Accession Number HCT.1986.111.29 Title Rayon fiber, differential interference contrast, 200X, weft specimen Image Identification information 003.1986.111.29.08-22-2014.DIC..200X.MM.rayonUNK.dressfabricweft Image capture digital Date of image capture 08/22/2014 Microscopist K. Jakes Microscope Zeiss Axioplan Mounting agent and RI Meltmount RI 1.539 Microscopic technique Differential interference contrast Fiber size medium fiber diameter Striations present Comments low orders of color

003.1986.111.29.08-22-2014.DIC..200X.MM.rayonUNK.greenfabricweft

Source manufactured Accession Number HCT.1986.111.29 Title Rayon fiber, differential interference contrast, 200X Image Identification information 003.1986.111.29.08-22-2014.DIC..200X.MM.rayonUNK.greenfabricweft Image capture digital Date of image capture 08/22/2014 Microscopist K. Jakes Microscope Zeiss Axioplan Mounting agent and RI Meltmount RI 1.539 Microscopic technique Differential interference contrast Fiber size medium fiber diameter Striations present Comments low orders of color

004.1986.111.29.08-22-2014.POLFOR.200X.MM.rayonUNK.dressfabricweft

Source manufactured Accession Number HCT.1986.111.29 Title Rayon fiber, polarized light, first order red plate added, 200X, weft specimen Image Identification information 004.1986.111.29.08-22-2014.POLFOR.200X.MM.rayonUNK.dressfabricweft Image capture digital Date of image capture 08/22/2014 Microscopist K. Jakes Microscope Zeiss Axioplan Mounting agent and RI Meltmount RI 1.539 Microscopic technique Polarized light, first order red plate added Fiber size medium fiber diameter Striations present Sign of elongation Positive sign of elongation . Addition color achieved when fiber is oriented parallel to optic axis of first order red plate. Subtraction color achieved when fiber is oriented perpendicular to optic axis of first order red plate.

004.1986.111.29.08-22-2014.POLFOR.200X.MM.rayonUNK.greenfabricweft

Source manufactured Accession Number HCT.1986.111.29 Title Rayon fiber, polarized light, first order red plate added, 200X, weft specimen Image Identification information 004.1986.111.29.08-22-2014.POLFOR.200X.MM.rayonUNK.greenfabricweft Image capture digital Date of image capture 08/22/2014 Microscopist K. Jakes Microscope Zeiss Axioplan Mounting agent and RI Meltmount RI 1.539 Microscopic technique Polarized light, first order red plate added Fiber size medium fiber diameter Striations present Sign of elongation Positive sign of elongation . Addition color achieved when fiber is oriented parallel to optic axis of first order red plate. Subtraction color achieved when fiber is oriented perpendicular to optic axis of first order red plate.