How are the photos developed? What's the principle?

Category: Culture/Art>> Calligraphy, Painting and Art

Analysis:

Equipment:

There doesn’t seem to be much equipment in the darkroom. , a small room can produce a masterpiece, think about it

In the movie "The Killing Fields", Wu Han washed his headshot in the bathroom, without using an enlarger, relying entirely on experience,

You still succeeded in developing a headshot, which shows that it depends on the person. If you are interested, you can also

You don’t need to use an enlarger and use an electric light to expose it. Let’s talk about the black and white darkroom! (Because the author

has limited funds, he cannot afford a color darkroom, which is a great regret in life)

1. Enlarger: The function of the enlarger is to use a light source to project the image of the film. Go to the photo paper on the work surface

and make the exposure.

2. Potion: Whether it is developing film or developing photos, there are three kinds of potion: developer, fixer and

Fixer. Common brands include Kodak, ILFORD, AGFA (that’s me!), etc.

Developer: As the name suggests, it is used for development. Its component is silver bromide. The black and white photos we

see are actually reduced silver particles. < /p>

Running around (haha! It seems that I can post it to the marvle version)

Fixer: Fix the image firmly on the photographic paper or film. The composition is soda (hypo). )

Other special liquids: such as waterproof liquid (to prevent water droplets from forming on the surface of photo paper or film

Ugly water spots will be ruined if they form on the film), Stain

(Dye photo paper) and the list goes on.

3. Timer: Just like the shutter controls the camera, the timer controls the exposure time of the enlarger. Some people with physiological clocks

may not need to use it.

4. Photo paper: There are many types, and the more commonly used ones are like film types. The photo paper's sensitivity is approximately

ASA200, which is insensitive to red and yellow-green light sources, but don't make it too bright, it will still be

sensitive! At the same time, because most of the negatives are full-color, they are not sold under safe lights.

The first embarrassing thing I did when I was new to the darkroom was to develop the negatives under the safe light, and of course it came out

The beautiful black dragon was taken home and nailed to the wall as a warning. :)

5. Safety light: Usually red or yellow-green, I have never seen other colors used. If you use a light bulb as the

light source, remember not to make it too bright, otherwise it will not light up at all. Not safe! Safety lights sold on the market are very expensive. It is recommended that you make one yourself. What I am most proud of is that one day I suddenly had a sudden thought: Why not use red light-emitting diodes as safety lights? Economical and affordable, related to production

We will talk about it in the future, we can talk about it in a long article.

6. Clip: Used to clip photo paper. The solution is either a strong acid or a strong alkali. Unless you wear gloves, otherwise

I suggest you don’t make it difficult for yourself. Once I saw an innocent school girl stirring a bucket of water in the darkroom. I thought she was washing her hands. After asking, I found out that she was actually

Preparing film developer! If you are interested, take a widely used test paper and throw it in

You will know why she flushed tap water for half an hour later.

7. Development tank: This is specially used to develop negative films. The film must not be exposed to light from the time it is rolled into the development tank to the final washing.

8. Thermometer: The ideal temperature when developing film is 20 degrees Celsius, so temperature is very important for a high-quality darkroom

9. Measuring cup and measuring cylinder: Commonly found in chemical equipment stores, they are used to measure the dilution ratio of potions.

Basically, with these things in place, you can start zooming in on your photos, but of course, make your

room dark first.

10. Pressing frame: An auxiliary device for enlarging photos. It can press the photo paper flatly on the frame and adjust the size of the surrounding white edges. Generally, it is not necessary to Cheap.

11. Foot activator: Enlarging photos is actually a kind of exercise, sometimes it is more like singing, often with two hands playing shadow games under the enlarger. It's a shame that I have a third hand to press the timer switch. The foot activator is the third hand.

12. Matte stick: Used to reduce light when zooming in. You can go to a photographic equipment store and spend hundreds of dollars to purchase it. You can also

DIY it by gluing a few wires to cardboard. If you don’t even have wire, just use your fingers!

13. Air conditioner: In the summer in Taiwan, you often have to take a shower yourself after taking photos. If there is an air conditioner, you can

have a more enjoyable time.

14. Sound: When you are developing photos, you will inevitably get bored if you are locked in a darkroom alone. You can listen to some music and crosstalk

to relax and avoid wasting photo paper by washing photos. Speakers are especially useful for people who are afraid of the dark.

But please don’t put on a sparkling stereo, you’ll regret it.