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

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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.jpg

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.jpg

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.jpg

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.jpg

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.jpg

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.jpg

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.jpg

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.jpg

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.jpg

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.jpg

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.jpg

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.jpg

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.jpg

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.jpg

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.jpg

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.jpg

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.jpg

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.jpg

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.