What could cause grain to be great on roll, & suck on another roll? Same Film/ISO/Dev

[pepeguitarra]

Under Exposure?

Under Exposure?

I am still in the learning curve and trying some odd films like: Lady Gray Lomography 400 on my Pentax SV, just estimating the exposure using SUNNY 16, or should I say SHADY 4? This is what I got developing with Kodak HC110 (1+31), Ilford Bath, Ilford Rapid Fixer, Permawash, Kodak Flow, and distilled water for washing and everything else. I have not messed with LR either. Just as it came out of the scanner (no scanner adjustment). So far, Tmax 400 and Perceptol are winning, I obtain no grain at all.

Under-exposure by Palenquero Photography, on Flickr

Pentax SV by Palenquero Photography, on Flickr

 

[DNG]

Looking at the full size image on your flickr, there are some crazy outlining artifacts - the lettering on the truck is outlined, the little boy on the left in the shadows is outlined.
You're doing something funky with the sharpening/processing, or flickr is.

I think I still over sharpen, I use Topaz Detail after I am done in Lr, I do sharpen a bit in Lr... maybe I should do a lot less sharpening in Lr.....

 

[Huss]

I think I still over sharpen, I use Topaz Detail after I am done in Lr, I do sharpen a bit in Lr... maybe I should do a lot less sharpening in Lr.....

A little sharpening in LR is fine, but stop with the Topaz Detail. I think that's what's causing those artifacts. This is a film image not digital!

 

[DNG]

A little sharpening in LR is fine, but stop with the Topaz Detail. I think that's what's causing those artifacts. This is a film image not digital!

Well technically it's a digital at this point. Made from film.

But I totally get what you're saying I'm just messing with you 😉

Sent from my SM-G955U using Tapatalk

 

[ellisson]

DNG and all,
For a nice scientific overview of all factors - physical and chemical - that affect grain size and shape, see "The Chemistry of Photography" by Roger K. Bunting (Photoglass Press, 1987).
A dated volume, but not much has changed in the film world since it was published.

The effect of variable temperature on grain during film development - "reticulation", and other factors that modify grain size and shape are nicely presented and explained in detail.

 

[DNG]

DNG and all,
For a nice scientific overview of all factors - physical and chemical - that affect grain size and shape, see "The Chemistry of Photography" by Roger K. Bunting (Photoglass Press, 1987).
A dated volume, but not much has changed in the film world since it was published.

The effect of variable temperature on grain during film development - "reticulation", and other factors that modify grain size and shape are nicely presented and explained in detail.

Thanks for the reference book.