TriX and HP5+ time difference in processing time with D76

[koraks]

grain simulation softaware.

* Relying on two 'profiles', one of which created using 10-year expired film, and two different developers
* Profiles created using unknown parameters apart from developer and development time used
* Profiles created for the purpose of digitally adding grain to images instead of as a basis for film comparisons
* Unclear if profiles were based on scanned film or scanned prints made from film, and in both cases, how the process from negative to digital profile was implemented; grain can look completely different depending on how it is digitized or printed.

Not to mention that that profiles created under unknown testing conditions and then applied to a digital image in software bear little relevance for real-world negatives or prints that may (will) be exposed and processed completely differently - and that grain, of all factors, is just ONE aspect of the characteristics of a film.

I mean, honestly - who cares about 'grain simulation software' when you're making negatives.

[Pere Casals]

Koraks, the grain structures of hp/tx are very well known, I've posted those simulation settings to explain how the structure is, not as an scientific proof, which is not.

One can say that tx has a more dramatic grain and that hp has a beautiful packed grain, but, imho those curves show the concept better.

Also those curves show what one has to do with exposure to dominate the grain structure in the image, when that may matter, in LF it would be 45, txp, rodinal and 30" paper.