If you ever took the top off the bottle and put your nose up to it for a sniff to see what it smells like, you might wish it had been a nuclear rod instead. It'll scorch your eyeballs from the backside. If you had stopped up sinuses before, you surely won't after. Although you probably won't have sinuses either. Some bad-a$$ stuff.
MSDS may be great help to physicians or hazmat teams who have to deal with injuries/poisonings/spills, but they are mostly useless to photo amateurs.
Well, that's sort of like holding one's head underwater for five minutes, then complaining that one's heart has stopped. In both cases the solution to the problem is: Don't do that...
I've been diluting from and using glacial acetic acid without a single problem since the 70s, and I'm still alive.
Imagine that.
Ken
sometimes,natural selection fails us
If you ever took the top off the bottle and put your nose up to it for a sniff to see what it smells like, you might wish it had been a nuclear rod instead.
I'm no chemist, so I really have no clue. Are the other common acids of that strength level as sharp in odor? I won't go on about it any more, but that stuff is pretty unforgettable and unmistakeable. I'm glad I never put my nose up to a bottle of it and took a good whiff.
If you can't read and understand an MSDS, you really should not be handling chemicals. At all.
Which part of "Wear personal protective equipment", "Ensure adequate ventilation, especially in confined areas.", "Wear appropriate protective gloves to prevent skin contact. Replace torn or punctured gloves promptly", "Wear appropriate body protection to prevent skin contact" and "Avoid contact with skin, eyes and clothing" are so hard to understand?. These are all phrases taken from the MSDS for Glucose, a compound that most of us eat on a regular basis, and allow me to state it once more: this is ridiculous.
Whatever this MSDS is good for, the information contained therein is useless for people casually working in a darkroom. It does more damage than it prevents, because people will look at the MSDS of harmless compounds, shake their heads and will ignore serious warnings for actually dangerous compounds from then on, exposing themselves and others to unnecessary risks.
Funny thing is I often read hysterical warnings about chemical dangers in threads about relatively mundane compounds, but rarely in threads about Pyrogallol/Catechol based developers, Dichromate bleaches and Sulfide toners.
The fact is, the entire chemical industry uses MSDS documents as the first line of safety information.
At my company, if you cant read and understand an MSDS, you are fired. Period. We waste no time with people who cannot understand basic safety.
Citric Acid can allegedly destroy dyes in color film.
Who cares? AFAIK your company doesn't operate darkrooms, and most people actually working in darkroom don't have the qualifications to work at your company.
And that's exactly my issue: I have no problem with chemical industry using MSDS, but I do have a problem with MSDS touted as valuable resources for darkroom amateurs with no formal training in chemistry.
APUG would be a pretty sad and lonely place, especially from an artistic standpoint, if they allowed only folks who live up to your MSDS literacy requirements.
@pdeeh: that type of photography you asked for already existed well over 50 years ago, it was the common way of producing images back then: give the exposed film roll to some lab, pick up photos/slides some time later. See, no chemistry involved! Most people presenting their Velvia slides would have vigorously rejected the notion that their slides were reexposed or even bleached!
@Gunfleet: Citric Acid can allegedly destroy dyes in color film.
MSDS' are written for people with a high school education. If you have a high school diploma, you should be able to understand the safety information on an MSDS. The people who pack (and handle) our chemicals for shipment are not chemists, or even college graduates. The DHL or UPS guy shipping our chemicals may not have much more than a high school education. If there is a spill in his truck, he has to know what safety precautions to take which is all covered in any correctly written MSDS. The clerk at my company who receives incoming chemicals has to be able to understand the MSDS from all the unknown samples he/she receives.
As long as all sheets cry "WOLF!!!" regardless of actual hazards, this is as good as no MSDS writing it. A sheet, which contains 80% information that falls under the "well, they had to write this for CYA purposes, let's not take this seriously" category, hardly satisfy this requirement you just stated, don't you agree? Recommending safety showers and protective gloves for rock salt and grape sugar is hogwash, not safety information.Chemicals released "into the wild" have to have safety information available and understandable by any reasonably educated adult.
Here the dichromates are not available cept eg after a college invoice.Which part of "Wear personal protective equipment", "Ensure adequate ventilation, especially in confined areas.", "Wear appropriate protective gloves to prevent skin contact. Replace torn or punctured gloves promptly", "Wear appropriate body protection to prevent skin contact" and "Avoid contact with skin, eyes and clothing" are so hard to understand?. These are all phrases taken from the MSDS for Glucose, a compound that most of us eat on a regular basis, and allow me to state it once more: this is ridiculous.
Whatever this MSDS is good for, the information contained therein is useless for people casually working in a darkroom. It does more damage than it prevents, because people will look at the MSDS of harmless compounds, shake their heads and will ignore serious warnings for actually dangerous compounds from then on, exposing themselves and others to unnecessary risks.
Funny thing is I often read hysterical warnings about chemical dangers in threads about relatively mundane compounds, but rarely in threads about Pyrogallol/Catechol based developers, Dichromate bleaches and Sulfide toners.
Here the dichromates are not available cept eg after a college invoice.
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