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Photographers' Formulary Tween 20 100% Solution - 30 ml
Photographers' Formulary Tween 20 100% Solution - 30 ml
B&H # PHT20S30ML MFR # 10-1478 30ML
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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: 675152147806
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 | 0.1 lb |
| Box Dimensions (LxWxH) | 3.2 x 1.3 x 1.1" |
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