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O |
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|
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| |
Oatmeal
Cloth |
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A
Heavy, Soft Fabric With A Specked Pebbly Surface. Used For Drapery,
Upholstery.
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| Odhani |
A
Veil-cloth For A Woman, Often Worn Tucked Into The Side Of The Waist
And Drawn Upward Over The Back And The Head, The Free End Being
Draped Over The Shoulder. Literally, 'a Wrap'.

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| Oil
Coated |
The
Application Of Oil To A Fabric (usually Linseed Oil) To Seal It And
Made It Waterproof.
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| Oil
Repellent |
A
Treatment That Allows A Fabric To Resist Staining By Oily
Substances.
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| Oilcloth |
A
General Term For Any Oil Coated Fabric.
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Oiled
Silk; Oiled Viscose
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Silk
And Viscose Fabrics, Respectively, Made Impervious To Water By
Treatment With A Drying Oil. |
| Oiled
Wool |
Unscoured
Or Undyed Knitting Wool Or Wool Dyed Before Spinning And Containing
Added Oil Not Subsequently Removed.

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| Oil-repellent |
Descriptive
Of Textile Material On Which Oil Globules Do Not Spread.
 |
| Olefin
(fibre) (us.) |
A
Term Used To Describe Manufactured Fibres In Which The Fibre-forming
Substance Is Any Long-chain Synthetic Polymer Composed Of At Least
85% By Weight Of Ethene (ethylene), Propane (propylene), Or Other
Olefin Units. The Term Includes The Iso Generic Names Are
Polypropylene And Polyethylene

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| Oligomer |
A
Simple Polymer Containing A Small Number Of Repeating Units., Note:
The Oligomer Most Frequently Encountered In The Textile Industry Is
The Cyclic Trimer Of Poly(ethylene Benzene-1,4-dicarboxylate) (poly(ethylene
Terephthalate)), The Polymer Used For Polyester Fibre. This Material
Can Form Deposits During The Processing And Dyeing Of Yarns And
Fabrics.

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| Ombre |
Refers
To A Gradual Change In Shade From Light To Dark Or From One Color To
Another. May Be Done As A Yarn Dye Or In Printing.

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| Ombré |
A
French Term Meaning Shaded. It Is Used In Relation To Textiles (a)
As An Adjective To Describe Fabrics With A Dyed, Printed, Or Woven
Design In Which The Colour Is Graduated From Light To Dark And Often
Into Stripes Of Varying Shades: And (b) As A Noun, Meaning (i)
Shaded Or (ii) A Fabric With Shaded Design.

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| On-call
Cotton |
Raw
Cotton Purchased Under A Procedure Whereby The Price (points On Or
Off Futures) Is Between Buyer And Seller, But The Actual Futures
Price Is Left To Be Fixed Within A Stipulated Period. Buyer Has The
Right To 'call' (i.e., Demand Fixation Of The Futures Price) At Any
Time Within Stipulated Period.

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| Onium
Dye |
A
Cationic Dye That Is Solubilized By A Labile Ammonium, Sulphonium,
Phosphonium, Or Oxonium Substituent Which Splits Off During Fixation
To Leave An Insoluble Colorant In The Fibre.

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| Open
Boil |
Scouring
Of Cellulosic Textiles With Alkaline Liquors In Open-topped Vessels
At Or Near The Boiling. Note: Scours At Temperatures Lower Than The
Boil Are Usually Referred To As 'steeps'.

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| Open
End |
A
High Speed Yarn Spinning Process That Creates Yarn By Transferring
Twist From Previously Formed Yarn To Fiber Or Sliver Continuously
Fed Into The Spinning Machine. The Twisting May Be Done By
Mechanical Methods, Rotors Or Air Jets.

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| Open-end
Spinning; Break Spinning |
A
Spinning System In Which Sliver Feedstock Is Highly Drafted, Ideally
To Individual Fibre State, And Thus Creates An Open End Or Break In
The Fibre Flow. The Fibres Are Subsequently Assembled On The End Of
A Rotating Yarn And Twisted In. Various Techniques Are Available For
Collecting And Twisting The Fibres Into A Yarn, The Most Noteworthy
Being Rotor Spinning And Friction Spinning.

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| Opening |
The
Action Of Separating Closely Packed Fibres From Each Other At An
Early Stage In The Processing Of Raw Material Into Yam.

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| Open-width
Processing |
The
Treatment Of Fabric At Its Full Width In The Unfolded State In
Contrast To Rope-form Processing. The Fabric May Be Carried On
Rollers Through The Processing Media Or Be Held On A Roller, As In
Dyeing.

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| Optical
Brightener |
A
Substance That Is Added To An Uncoloured Or A Coloured Textile
Material To Increase The Apparent Reflectance In The Visible Region
By Conversion Of Ultra-violet Radiation Into Visible Light And So To
Increase The Apparent Brightness Or Whiteness. Also Termed
Fluorescent Brightener; Optical Whitener; Fluorescent Whitening
Agent; Brightening Agent

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| Organdy |
A
Thin, Very Stiff, Lightweight, Plain Weave Fabric Usually Of Cotton
Or Cotton Blends. It Is Often Treated To Make The Crisp Finish
Permanent. Used For Apparel Trim Such As Collars And Cuffs, Evening
Wear, Dresses, Curtains.

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| Organza |
A
Thin, Plain Weave, Sheer Fabric Of Silk Or Synthetic Filament Yarn
Such As Polyester Or Nylon . Used For Evening Or Party Wear, Bridal
Wear, Curtains, Millinery.

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| Orientation |
(1)
Parallelism Of Fibres, Usually As A Result Of A Combing Or
Attenuating Action On Fibre Assemblies Causing The Fibres To Lie
Substantially Parallel To The Axis Of The Web Or Strand. (2) A
Predominant Direction Of Linear Molecules In The Fine Structure Of
Fibres. Note 1: In Man-made Fibres Orientation Is Usually Parallel
To The Fibre Axis As A Result Of Extrusion Stretching, Or Drawing.
In Natural Fibres The Predominant Direction Is Determined During
Growth, For Example A Helix Around The Fibre Axis In Cotton. Note 2:
Unoriented Structures Are Those In Which Orientation Is Absent.
Disoriented Structures Are Those In Which Orientation Has Been
Reduced Or Eliminated As A Result Of A Disrupting Treatment

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| Osnaburg |
A
Coarse, Strong, Plain Weave, Medium To Heavy Weight Fabric, Usually
Of Cotton . Used For Industrial Purposes, Drapery And Upholstery.

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| Ottoman |
A
Medium To Heavy Weight Fabric With Wide Horizontal Ribs . May Be
Knit Or Woven. Used For Women's Apparel, Upholstery, Drapery.

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Outline
Embroidered
 |
A
Fabric With A Design Motif Traced (outlined) With Embroidery
Stitches. |
Outline
Quilted
 |
A
Quilted Fabric In Which The Quilting Stitches Follow The Motif Of A
Print Design. |
Oven-dry
Weight
 |
The
Constant Weight Of Textile Material Obtained By Drying At A
Temperature Of 105 ± 3°c. |
| Overdyed |
Dyeing
Of A Print Or Yarn Dyed Fabric In A Shade Which Does Not Totally
Cover The Original Design.
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| Overprinted |
Usually
Refers To Printing Over A Previously Dyed Fabric, However Yarn Dyes,
Cross Dyes And Previously Printed Fabrics Are Also Sometimes
Overprinted.

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| Oxford |
A
Fabric With A Single Filling Yarn Woven Over And Under 2 Smaller
Warp Yarns. Commonly Found In Cotton Shirtings, But Oxfords
Are Produced In A Wide Variety Of Fibers And Weights For Many Uses,
Mainly In Apparel.

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