Terms for Black and White Prints

[blansky]

Wow, I'm sure glad you don't have to know all this stuff to be able to work with it.

I'd be screwed.

The bliss of ignorance.



Michael McBlane

 

[fhovie]

I have a hard time calling RC paper Silver gelatin. I figure they are for "proofing" - for evaluating a negative before you put it on good (real) paper. Kind of like the stuff color photos from Walmart come on.

glitche is INK JET - like that fade fast stuff that spills out of the ol'HP

Real Silver Gelatin - good old fiber paper with a meaningful byarta layer on it. Preferably silver chloride (best possible monochrome imagees) but if the camera weighs less than 20lbs it will be silver bromide.

Van Dyke, Kallitype - Silver iron right on the paper - kinda like great great grandmother used to make - really good stuff but not super hi res. Kalitypes that have been selenium toned are almost 3d - also pretty easy

Cyanotype - iron cyanide right on the paper - beautiful blue - you have to try this one - cheap- easy and too cool to miss

Aubumen - like silver gelatin except egg whites instead of animal gelatin - glossy hi-res creamy looking images - very cool.

Platinum/Paladium - like Kallitype except too expensive for me - Supposed to be the best of the best but a good selenium toned kalitype is pretty close.

There a bunch of other "types" some old and some modern -ziatype is modern. One noteworthy difference is tin type and duerruagge (ok I kant spell it) these metal processes are direct image onto polished metal in the camera with black paint or tar as the black area - no negatives were used the silver area became a very light grey brown. Lots of interesting gasses and poisons and lots of polish. - Kind of like an early polaroid!

Then there is digitype - an image consisting of zillions of bits that can be used for anything not worthy of keeping past a year or two. These devices can leak in which case you use a "bit-Bucket" to catch the bits as they roll out. Some distortion can occur as can be seen in glitche prints when one ink cartrige gets low or the power goes off in the middle of a 13x19 Pictorico White glossy film. One redeeming thing though - the digitype can be converted into a big negative and then made into a kalitype in which case the 700 hours of learning and 4000 of good printers hard drives monitors and stuff will sort of pay off ... or you can get that 20 lb camera. I have done both and the big heavy camera makes my arms and shoulders big where the digi-type makes my butt big.


Now you have way too much information

 

[dr bob]

cut
A colloid can be thought as an emulsion but in this case the particles are small enough that surface effects become an important part of their behavior and they still have phase separation.An example would be milk of magnesia.

A solution is made of two or more miscible components with no phase separation, as is the case of sugar in water. Pt/pd, Van Dyke brown and silver salts in liquid gelatin are nothing more than solutions, they are NOT colloids or emulsions. Once they have gone through a chemical reaction they simply become solids embedded in other solids as is the case of silver papers, or they become solids deposited on other solids as is the case of pt/pd or VDB.

Furthermore the exclusionary condition of a semi permeable membrane is erroneous and misleading, ionic material in SOLUTION can and will be rejected by a semi permeable membrane depending on the size of the atom, type of membrane and physical conditions applied to the separation technique. This is best exemplified by the water purification technique of Reverse Osmosis.

Quite accurate, Jorge. In addition, we should mention that the active layer on film and paper is technically a suspension. Also there is, as you pointed out, a differeince between a semi-permeable membrane (ro) and an ion exchange membrane (water conditioning et c.) which _will_ transfer ionic material (along with some non-ionic stuff).

Your acumen, as usual, is appreciated, dr bob.

 

[Jorge]

Ah, suspension! that is the word I was looking for. Thanks Bob.

 

[happysnapper]

At my age, I can use all the suspension I can get!

 

[Paddy]

I’d swear that I’ve stumbled into the Mother Of All Hair Splitting forums. That’s MOAHS for all of you acrymonious types out there.

Going back for a moment to the “glitche” discussion,...the correct spelling is giclée. It’s pronounced “gee-clay” and it’s an upscaled term for inkjet print. It means “to spray water”(as in between the teeth). I guess “inkjet” just didn’t sound refined enough for all of the self appointed Grand Poobahs in the ART WORLD.

Them's digitals gone and got themselve's Bonafied!!! (fade in the dualing banjoes theme song from Deliverance; cut to a scene where we see an inbred looking brute, with a shiny new digital Rebel around his neck. Kneeling in front of him, looking rather distraught, is some poor schmuck pathetically clutching his fully manual,...and heavy "view camera". We hear the goon behind him say "squeal like a piggy!...fade to black.

But I digress.

 

[lee]

Then he says, "That's a mighty fine camera you got there boy." or words to that effect.



lee\c

 

[Ed Sukach]

I’d swear that I’ve stumbled into the Mother Of All Hair Splitting forums. That’s MOAHS for all of you acrymonious types out there.

Hah! You read my mind. In a way, it is refreshing to see a discussion so enmeshed in minutia. Makes me feel better about some of my errant ramblings, where I've chosen some really obscure idea to bring to the light.

 

[clay]

Now Ed, it is it minutia or minutiae? I can't seem to remember if we were discussing more than one thing....


And have you ever tried to split a hair? It is much harder than it sounds.

 

[Ed Sukach]

I replied to a single subject: *A* forum enmeshed ... therefore singular - and "minutia".

Kind of redundantly repetitive, no?

 

[MikeK]

And have you ever tried to split a hair? It is much harder than it sounds.

So what does a hair splitting sound like? I would have thought it soft and whispery, but you say it is a hard sound, which I would have thought went with baldness, so now I am intrigued.

- Mike

 

[Adrian Twiss]

Actually, I've seen a demonstration of hair splitting accomplished with a Wilkinson Sword blade from a safety razor (their British you know) :Zzz:

 

[noblebeast]

Well, I don't know about all that. But on the ranch I've seen a lot of hare
splitting - a whole different animal I suppose... :whistle: