TF-4 vs Ilford Rapid Fixer.

[norm123]

Hi
I was thinking that TF-4 (PF fixer) was a really different fixer compared to Ilford Rapid Fixer. Are they both sodium thiosulfates? Are they both considered rapid fixers? I'm using Ilford for film and 2 baths TF-4 for paper. What's about plain hypo? It's not clear for me. I'm a bit confused.

Best regards

 

[norm123]

I realize that TF-4 is an ammonium fixer. So, I presume that Ilford Rapid Fixer is a sodium thiosulfate fixer.

 

[norm123]

Both Ilford Rapid Fixer and TF-4 are rapid fixers based on ammonium thiosulfate. Ilford Rapid Fixer is mildly acidic while TF-4 is alkaline.

Thank you for the precisions. And plain hypo?

 

[norm123]

"Plain hypo" is usually meant to mean plain sodium thiosulfate.

Thank you!