Optical Brightening Agents in Photographic Paper 2016-02-07

Mustafa Umut Sarac submitted a new resource:

(there was a url link here which no longer exists) - Optical Brightening Agents in Photographic Paper

Optical Brightening Agents in Photographic Paper

Author(s): Paul Messier, Valerie Baas, Diane Tafilowski and Lauren Varga

Source: Journal of the American Institute for Conservation, Vol. 44, No. 1 (Spring, 2005), pp.1-12

Published by: Maney Publishing on behalf of The American Institute for Conservation of Historic &Artistic Works

Find the attached paper in pdf.

Click to expand...

(there was a url link here which no longer exists)

ABSTRACT - A reference collection of mostly
20th-century photographic paper was surveyed for
the presence of optical brightening agents. Only
fiber-based gelatin silver paper was assessed.I n all,
1,804 samples were examined, dating from 1896 to
2004 and representing 40 different manufacturers.
No optical brightening agents were found in samples
dating from 1896 to 1949. The first occurrence of
optical brightening agent was found in samples dating
between 1950 and 1954. Between 1955 and 1964, the
frequency of occurrence for optical brightening
agents increased rapidly Towardt he latter part of this
date ranget he occurrence of optical brighteners rose,
with 70% of all samples showing brighteners.
Between 1965 and 1979, occurrence of optical
brightening agents declined to a low of 39% of all
samples. A marked increase in occurrence was
observed after 1980, when 81% of samples exhibited
optical brightening agents These results indicate that
a significant proportion, and for some time periods a
significant majority of black-and-white paper-based
photographs made after the early 1950s contain
optical brightening agents. This finding has
implications for the treatment and display of
photographs as the presence of optical brightening
agents is not routinely documented and the effects of
storage environment display and treatment are poorly
understood.

Is there a list of current papers that do not have OBAs?

Good question , If you can find a reference title , I can download from an database and put here.

I will search for it now.

Umut

List of Inkjet or Alternative Process Papers without Optical Brighteners

doughowk said:

Is there a list of current papers that do not have OBAs?

Click to expand...

Some people uses inkjet papers for alternative processes. Here is a list.

http://www.photoreview.com.au/tips/outputting/Optical-Brighteners-in-Inkjet-Paper

Papers Without Optical Brighteners
The following list contains all of the inkjet papers we have been able to find that claim to be free of optical brighteners. This list will be posted on the Photo Review website and we will add new OBA-free papers as we discover them or as they are released. If you know of any papers that have not been included, please let us know by emailing edmail@photoreview.com.au.

Arches Natural Soft
Arches Natural Textured
Breathing Color Chromata White
Breathing Colour Sterling Rag 210
Canson PhotoSatin
Canson Watercolor Digital
Crane Museo Silver Rag
Crane Museo Portfolio Rag
Epson Ultra Premium Photo Paper Glossy
Epson Premium Photo Paper Glossy
Epson UltraSmooth Fine Art Paper
Hahnemuhle Photo Art
Hahnemuhle Photo Rag Pearl
Hahnemuhle Fine Art Pearl
Hahnemuhle William Turner
Hahnemuhle Albrecht Durer
Hahnemuhle Museum Etching
Hahnemuhle Natural Art Duo
Hawk Mountain Nighthawk Natural
HP Premium Instant Dry Gloss Photo Paper
HP Professional Satin Photo Paper
HP Hahnemuhle Watercolor Paper
HP Professional Matte Canvas
HP Collector Satin Canvas
Longbottom Digital Ultraproof
Lumijet Classic Velour
Lumijet Natural Art
Lumijet Master's Canvas
Permajet Classic FineArt Artist Classic
Permajet ImageLife Alpha
Permajet ImageLife Delta Matt Fibre

Thanks, Michael, for the info on Ilford MGWT. Comparing fact sheets, Ilford Gallerie will not change tone with extended washing but warmest tone of MGWT achieved with 30+mins washing. Nothing in fact sheets specific to OBAs. Caveat emptor.

Gawain Weaver has done a lot of work on this and has published some papers on it. See here: Dead Link Removed

There may be more in his RIT work.

PE