Reference:  1)  "Identification of Textile Materials", The Textile 
Institute, Manchester 1985 and 2) "Microscopy of Textile Fibres", 
Greaves and Saville, BIOS l995

Refractive indices

Acrylic - 1.511 (parallel) and 1.514 (perpendicular)

Nylon 11 - 1.553 (parallel) and 1.507 (perpendicular)
Nylon 6  - 1.575 (parallel) and 1.526 (perpendicular)
Nylon 6.6 - 1.578 (parallel) and 1.522 (perpendicular)

Polyester - 1.706 (parallel) and 1.546 (perpendicular)


David Walker
Talisman Restoration, Inc.


On Jul 9, 2004, at 1:36 PM, Margaret Geiss-Mooney wrote:

> Hi there, TexCon colleagues – I am going crazy trying to put my hands 
> on the reference material that lists the refractive indices for a 
> variety of synthetic fibres – I know it’s around here somewhere. 
> Anyone can direct me to the information? I am specifically looking for 
> nylon, polyester and acrylic. Thanks!
>
> Regards,
>
> Meg Geiss-Mooney
>
> Textile/Costume Conservator
>
> [log in to unmask]
>
>
>
> ---
>  Outgoing mail is certified Virus Free.
>  Checked by AVG anti-virus system (http://www.grisoft.com).
>  Version: 6.0.716 / Virus Database: 472 - Release Date: 7/5/2004
>