Benzotriazole

[Donald Qualls]

So that is what is called buckshot then?

Technically, there are two differences between birdshot (what this probably really is) and buckshot.

Size: birdshot runs from just over a millimeter pellet size for "dust shot" up to around 4.5 mm for BB (there are/were larger sizes but they're no longer common) and buckshot starts at #4 at 6 mm and goes up to 000 at just over 9 mm -- bigger than that and it's called "round ball" or "pumpkin ball" and loaded as single, duplex, or triplex balls one on top of the other (in shotshells or muzzle loaders).

Manufacturing method: birdshot is almost universally produced by either a shot tower (molten metal is dropped through a sieve and allowed to fall far enough to spherize and solidify before landing in water that chills and hardens the shot, before being sieved for size) or a shot roller (molten metal is dispensed through a nozzle to roll down a metal incline into water), while buckshot is often cast in molds on a chain-mold machine, then tumbled to smooth off the sprue cut and mold seam (tumbling also surface hardens the metal, a little).

Shot used in zeroing scales at manufacture is generally pretty small birdshot; this gives a smaller minimum weight increment, and is cheaper per gram (usually).

 

[Molli]

From an old post.
No mention of paper type.
Promising!

Effects of using Benzatriazole on fogged paper.

I am trying to rescue some paper by adding Benzotriazole to the developer. Can you tell me what the "side effects" will be? Influence on contrast, printing time and developing time. Upto which volume of a 1% solution in 1 liter of developer will be worth trying? I am using Ilford PQ universal...

www.photrio.com

The image file name had most of the relevant information but I really should have added annotations within the text. I'm used to embedding ALT-text in image files and forget that some forums don't display that accessibility feature. My apologies.

At any rate, the image is "Benzotriazole and Agfa MCP 310 RC Glossy 5x7 Fog Test Part I and IV and V"
so, indeed, a Resin Coated Paper rescue test.
I'm glad to read that you've found the Benzotriazole to be effective with at least some of your papers there, too!

 

[Mick Fagan]

Thanks Donald, they looked to be around 5mm to 6mm in diameter.

 

[Donald Qualls]

Thanks Donald, they looked to be around 5mm to 6mm in diameter.

Much bigger than the ones in my Ohaus reloading scale (which I used in my darkroom from 2005 until this year). Those are around 1.5-2 mm, like #8 birdshot. Makes sense, as this is a small, inexpensive scale with little zeroing adjustment.

 

[Don_ih]

Much bigger than the ones in my Ohaus reloading scale (which I used in my darkroom from 2005 until this year). Those are around 1.5-2 mm, like #8 birdshot. Makes sense, as this is a small, inexpensive scale with little zeroing adjustment.

And mine had washers, bigger shot, and smaller shot. I think it's whatever they find on the floor.

 

[Xylo]

And mine had washers, bigger shot, and smaller shot. I think it's whatever they find on the floor.

They probably had a few guys who owned a blunderbuss who worked at the factory