69 votes
Accepted

Why is a dark-room safelight safe?

Photo films and papers are made from salts of silver that naturally only darken when exposed to violet or blue light. In the early days of photography, this was all that was available. Therefore these ...
Alan Marcus's user avatar
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32 votes

How do I safety check that there is no light in Darkroom / Darkbag?

In the darkroom, place a piece of the material you will be developing, flat, face up, on the work space. Place a handful of coins on this material. Using a timer, remove a coin every 5 minutes. 12 ...
Alan Marcus's user avatar
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31 votes
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How do I give a darkroom course without negatives from the attendees?

Make negatives specifically for the course: Ask yourself what you want to actually teach in your class, and come up with negatives to function as aids to those lessons. If all the students are ...
TheLuckless's user avatar
  • 2,315
24 votes

Can I use a cheap night lamp as a safelight?

It's likely to fog your paper. You need a specially designed red or amber filter or bulb. But... there's an easy test. Place a large coin on a sheet of unexposed photo paper. Expose the paper to your ...
bvy's user avatar
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21 votes

What should I look for in a respirator for chemical processing of photographic materials

Except for the smell of acetic acid, an ingredient in both the fixer and the stop bath, photo chemicals are relativity benign. Some rare cases of contact dermatitis which goes away if usage is stopped....
Alan Marcus's user avatar
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20 votes
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How do I safety check that there is no light in Darkroom / Darkbag?

If you are talking about locating a light leak in a changing bag for loading film into magazines and cameras without a darkroom available… Periodically, to check the condition of your changing bag, ...
Stan's user avatar
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17 votes

Why is a dark-room safelight safe?

it seems a little odd that there is a type of light that doesn't affect film or developing paper etc. There are types of light that don't affect the rods and cones in your retina, too. You can't see ...
Caleb's user avatar
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13 votes

What should I look for in a respirator for chemical processing of photographic materials

In general, don't. It's far better to ventilate the darkroom than to wear a respirator. Easier on you (respirators are stressful to wear, as everyone ought to know after more than a year of COVID-19),...
Zeiss Ikon's user avatar
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11 votes

Can I use a cheap night lamp as a safelight?

Dedicated safelight is the best. But when unavailable you can work with red bicycle light or red LED Christmas tree decoration. Colored LEDs have a narrow emitting band and are usually safer than ...
Jindra Lacko's user avatar
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10 votes
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Can I use a cheap night lamp as a safelight?

Te test proposed by @bvy is a nice one. I would just add a couple of tips. Put the light the furthest away you can. If the light does not heat, try using some layers of red cellophane paper https://...
Rafael's user avatar
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8 votes
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How would you remove power lines from a photo in the darkroom?

Not in the darkroom, but at the retouching (spotting) table. If you're working with large format film, you can paint them out on the negative. But that's risky. Most of the time you retouch the ...
ProPhotoGuy's user avatar
8 votes

Would a professional photographer in 1920s Europe have access to an enlarger?

The answer to your question is yes, a pro photog in 1920's Europe would definitely have had access to a darkroom enlarger. In fact, some enlargers available in the early 1920s were amazingly ...
Phil Hopkins's user avatar
8 votes
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Cannot get true blacks with my enlarger

Three things to check in this situation. Are your prints fully developed (that is, are you developing by time rather than snatching the print when it looks right under the safelight)? Adox seems to ...
Zeiss Ikon's user avatar
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7 votes

How to develop large dark room prints?

No need for all that, you lay the un-developed print on a plastic drop cloth. Have the developer, stop and fixer in a plastic pail. Using a large brush, such as wallpaper's use to apply wall paste. ...
Alan Marcus's user avatar
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6 votes

How can I avoid a yellowish hue in my darkroom print highlights?

Photo prints will yellow if improperly washed. We wash prints after the fix bath to completely remove residual chemicals. Try to save these prints by re-fixing and then washing in running water for ...
Alan Marcus's user avatar
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6 votes
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Darkroom 8x10 prints aren't as sharp as 4x5 negatives

With a grain focuser, compose with the lens wide open. Now stop down to the aperture you will be using. Now use the grain focuser. It is likely that you are focusing wide open, it is likely that the ...
Alan Marcus's user avatar
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6 votes
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Can red LEDs be used as darkroom safe lights?

Before making assumptions on monochromaticity with LED lights that aren't built for this purpose, test and/or measure. LEDs are often overdriven, and/or allowed to get reasonably hot, and/or used in ...
rackandboneman's user avatar
6 votes

How to develop large dark room prints?

Soft kitchen sponges and plastic gloves (the kind you use for dishwashing). Expect longer times than when submerging.
user95069's user avatar
  • 1,096
6 votes

What should I look for in a respirator for chemical processing of photographic materials

It depends on one's particular needs. Developer is quite toxic, fixer and stop - not really. Developer doesn't evaporate anything except water vapor, stop and fixer evaporate some non-toxic (but ...
fraxinus's user avatar
  • 259
6 votes

What should I look for in a respirator for chemical processing of photographic materials

I agree with the answers that suggest that you don't need a respirator for health and safety reasons, but if you simply don't like the odor of acetic acid or if you are worried about exposure to the ...
MTA's user avatar
  • 161
6 votes

Downsides to using test strips from different packages of photo paper?

Leftover test strips imply that you have more test strips than you need. Implies that a pack of paper includes enough test strips (or more than enough depending on how you look at it). This suggests ...
Bob Macaroni McStevens's user avatar
5 votes

Can I use a cheap night lamp as a safelight?

Photo print papers are mainly sensitive to violet and blue. Therefore, you can use a strong red filtered light bulb. The red coloration renders the outputted light void of violet and blue. The ...
Alan Marcus's user avatar
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5 votes

Enlarging - how to increase exposure time without closing the aperture too much?

Using an ND filter is the best option however, if this lash-up is for black & white printing, you can install a common lamp dimming switch. Only do this if the lamp operate at line voltage and ...
Alan Marcus's user avatar
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5 votes

Developing an image on photo paper, using a scanner?

Photo paper is ordinary paper coated with light sensitive chemical. These are crystals consisting of silver combined with iodine, or chlorine, or bromine. In their natural state they resemble table ...
Alan Marcus's user avatar
  • 38.9k
5 votes

How do I give a darkroom course without negatives from the attendees?

A big fun factor in seeing the darkroom at work for the first time (and all other times) is seeing your own image appearing on the paper So... Let them have fun then! There are several projects they ...
Rafael's user avatar
  • 24.5k
4 votes

Can I use a cheap night lamp as a safelight?

For a similar price, you can buy a red LED bulb and replace an existing bulb with that. Run the tests as described in other posts, but you won't be messing around with cellophane or bike lights. Some ...
Pete Kirkham's user avatar
4 votes
Accepted

What makes a good enlarging easel?

Simply put, just like the there is a difference between a Volkswagen Beetle and a Porsche 911, they both get you from point A to B, there is difference between basic and advanced. One is more ...
Alaska Man's user avatar
  • 3,608
4 votes

Is there a Safelight rgb or hex frequency?

If you had sheets of Rubylith masking film by ULANO™ you could lay a sheet over any device for a darkroom safe-light filter. If you peel off the strip-able layer, and it will cling right to the phone ...
Stan's user avatar
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