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Photographers' Formulary Tween 20 100% Solution - 100 ml

Photographers' Formulary Tween 20 100% Solution - 100 ml

B&H # PHT20100ML MFR # 10-1479 100ML
Photographers' Formulary Tween 20 100% Solution - 100 ml

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  • 1Description

Photographer's Formulary's Tween 20 , also known generically as Polysorbate 20 or sorbitan mono-9-octadecenoate poly(oxy-1,1-ethanediyl), is a surfactant and spreading agent.

First proposed for use in hand coated photographic printmaking by Dr. Michael Ware of the U.K. It is used extensively in industry but is usually confined to pharmaceuticals and other high-end applications due to its cost.
Tween 20 allows more emulsion to be put on the paper without the streaking and flaking that are normally associated with heavy coating.
Tween 20 does not "pull" the emulsion all the way through to the back side like Kodak PhotoFlo does.
It is typically used in very high dilutions. A 10 percent solution is a usual starting point, but some use it as dilute as a .1 % solution. Tween 20 almost always eliminates any need for double coating.
UPC: 675152147905
Table of Contents
  • 1Description
Synonyms Poly(oxyethylene)(20)-sorbitane monolaureate
Polyoxyethylenesorbitan monolaurate
Armotan PML-20
Capmul
Appearance Yellow to brownish-yellow oily liquid
Uses Argyrotype Process
Cyanotype process
Platinum and palladium printing
Coating papers
Wetting agent
Chemical Formula C58H114O26(w + x + y + z = 20)
Notes Tween 20 is very suitable for Silversafe and Buxton papers, but may interact unfavorably with gelatin-sized papers.
Packaging Info
Package Weight 0.5 lb
Box Dimensions (LxWxH) 4.4 x 1.3 x 1.1"

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