Sizing Glass Plate with Chromium Potassium Sulfate (Chromealum)

[ruilourosa]

i just promote some very gentle scrub with that cleaner that has some fisical abrasive content cif is the name, toothpast woud work too i suppose...

i

[jnantz]

hi OP
i used to sub layer with a hard coat of gelatin
but a handful of years ago, i just started coating
warm and putting on something super cold.
no hardener needed
and no sub coat needed. i was in total disbelief
when i was told it worked, and ... it does !

[Tin Can]

Also informative!

hi OP
i used to sub layer with a hard coat of gelatin
but a handful of years ago, i just started coating
warm and putting on something super cold.
no hardener needed
and no sub coat needed. i was in total disbelief
when i was told it worked, and ... it does !

[Robert Brazile]

Jason has hard-earned experience that should be listened to, but for what it's worth, I don't sub. Just wash very carefully with detergent and water, more or less as Pere describes. For reused plates with stubborn spots, I use a bit of whiting in alcohol first.

Robert

[Nodda Duma]

Robert has a good point. I didn’t sub before I started selling them, but had to start doing so because other folks don’t or couldn’t control their temperatures as well, or had different water than what I use, etc.

[jnantz]

Robert has a good point. I didn’t sub before I started selling them, but had to start doing so because other folks don’t or couldn’t control their temperatures as well, or had different water than what I use, etc.

NoddaDuma
I forgot those things would keep an emulsion layer from staying stuck. > oops! < Your methods make it foolproof for someone to use dry plates. When I first learned I can't tell you how many layers swirled down the drain kind of like a polaroid-lift gone very bad.

[Nodda Duma]

To be perfectly honest the technical knowledge I’ve gained over the past year has been massive. It’s been such a great learning experience. I’m pretty happy to have gotten to the point where I can proudly say I know what I don’t know, rather than not even knowing that.

[Tin Can]

Rebuilding the very secretive photography methods of the past is not easy

Deliberate misdirection was a common tactic to maintain superiority

aka Trade Secrets

I also admire your openness in process tips

You have done well!

To be perfectly honest the technical knowledge I’ve gained over the past year has been massive. It’s been such a great learning experience. I’m pretty happy to have gotten to the point where I can proudly say I know what I don’t know, rather than not even knowing that.

[jnantz]

To be perfectly honest the technical knowledge I’ve gained over the past year has been massive. It’s been such a great learning experience. I’m pretty happy to have gotten to the point where I can proudly say I know what I don’t know, rather than not even knowing that.

I can only imagine ! For me the more I think I know the more I realize I don't know !

Rebuilding the very secretive photography methods of the past is not easy

Deliberate misdirection was a common tactic to maintain superiority

aka Trade Secrets

I also admire your openness in process tips

You have done well!

+1 !