This 16 oz bottle of Edwal Anti-Scratch Hardener 16 ozis a liquid hardener designed for use with black and white film during the development process. When added to a non-hardening fixer, or used with films without a hardener in the emulsion, greater scratch resistance can be achieved.

Liquid Hardener for B&W Film    Increases Scratch Resistance    For Use in Non-Hardening Fixer

Related Questions and Answers

Q: 1. Would this work on a mirroless camera sensor?

A: No, this is not to be used on a camera sensor. It could potentially damage the sensor.

Q: 2. Is this a rapid fixer and is there a hardener that can be added?

A: Yes, Heico makes a hardener for this: https://www.bhphotovideo.com/c/product/21919-REG/Heico_HG96_Hardener_for_NH_5_Fixer.html

Q: 3. What is the shelf life of LFN Wetting Agent?

A: The shelf life of the Edwal LFN Wetting Agent for Black & White Film & Paper is several years as long as it's not mixed.

Q: 4. does this make 1 gallon?

A: Yes, you can make a gallon. Just follow the instructions on the bottle. I think you add 16 ml of NH5 to 2 quarts water, stir it, and then add water to make a gallon of stock solution. You don't have to worry about water temperature. I usually filter my water. This bottle NH5 makes about 3 gal of fixer stock solution. You use stock solution 1:1 for your tray. For example, mix 1 quart of stock solution with 1 quart of water, and use this in your tray to fix the prints. Rotate the prints in the tray about 1-3 minutes and then wash in running water.Hope this helps.Helen

Q: 5. My photoflo seems soapy do you think I need to dilute it more?

A: The solution should be smooth if you follow the instructions listed on the bottle.

Q: 6. Is a capful = 1/200 of a gallon?

A: The recommended dilution is 1:200. The cap size cannot be measured.

Q: 7. can you use just part A as a fixer? or do you need part b mixed? so can this be used as a fixer sans harder?

A: Yes just use part A. Part B is a hardener for films and some kinds of paper but mainly unnecessary.

Q: 8. What is the ISO speed of this emulsion?

A: There is no exact ISO for any liquid emulsion (such as the Fomaspeed Liquid Emulsion 1 kg + Hardener 15 ml) because it can vary from application to application. Generally, the more layers that are applied, the more sensitive the emulsion will be. However, the more layers of emulsion is applied to the base, the longer it will have to be exposed to get the full range of tones. Two layers (horizontal and vertical application - most common application) should be around ISO 1-3. This is also dependent on what kind of surface the emulsion is coated on.

Q: 9. Do you sell acetic anhydride in its pure form ?

A: We have glacial acetic acid from Photographers Formulary; https://www.bhphotovideo.com/c/product/123683-REG/Photographers_Formulary_10_0015_1_LITER_Glacial_Acetic_Acid.html We cannot ship this item, it can only be picked up in the store.

Q: 10. Has anyone found this useful in a marine climate?

A: The Pelican 1500CI Anti-Corrosion Kit is useful in humid marine type environments because it neutralizes the following corrosive gases: Chlorine/chlorine salts, Sulfur gases, Ozone, Nitrous oxides and other reactive atmospheric gases. The Lifespan Indicating Foam eliminates the guessing game. The color changes on the indicating foam to let you know when the film is ready to be replaced and can no longer absorb corrosive elements. The foam also acts as a secondary corrosion filter.