Question about Cameras

1 Answer

Silver halide crystals to silver

How would i be able to extract or convert these silver halide crystals found in the wasted FIXER unto metallic silver or silver dust? thanks

Posted by on

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 685 Answers

The silver in fixer is not in the halide form any longer. It has been chemically changed to ionic form which means you can pull it our through electrolytic plating. If you have a lot of fixer you can buy a recovery system fom http://www.cpacimaging.com/silvrecphotoelect.asp if a small volume a 9 volt pattery will allow you to extract silve and grow "crystals" that are interesting to look at.

Posted on Nov 04, 2009

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

When do I need to use a glass shield for my aquarium lighting?


When you are using a metal halide a glass shield is a necessity. Metal halides get really hot and one drop of water could cause the bulb to explode. A glass shield would also filter out the UV rays.

Aug 21, 2012 | Fish

1 Answer

What is a metal halide lamp?


The metal halide lamps come in two versions the regular one and the HQI version. These lamps are very useful to the aquarist needing a lot of light. Their commonly come in 250,400 and 1000 watt sizes. The bulbs range in lifetime from 6000-10000 hours.

Aug 21, 2012 | Fish

1 Answer

What types of lighting are available to choose from for my aquarium?


There are several types of lighting for aquariums, each with their own set of pros and cons. The various types include: incandescent bulbs, fluorescent bulbs, PC bulbs (power compact), metal halides and HQI halides.

Aug 14, 2012 | Fish

1 Answer

I need a replacement ballast and capacitor for a 400W metal halide outside light, I need to know who would carry it and also a wiring diagram


most home depots will have a replacement ballast for this light, inside of box will have the correct wiring diagram, and how to wire it, if not sure as to how to wire it call an electrician

Nov 22, 2011 | Home

1 Answer

How many volts should be coming from the light soccet connected to a ballast for a 400watt bulb I am reading 270v but the bulb will not light


hi, a word of warning , the ignition voltage of a metal halide( grow light ) is many thousands of volts .
the first thing to try is a replacement bulb , next is replace the ignitor ( usually a small block with 3 terminals ).
a metal halide lamp can often look to be perfect when infact its internally blown .
hope this helps

Apr 28, 2010 | Hydrofarm Flco95w Grow Light System

3 Answers

400 watt grow light


ballast is weak ,or the bulb. i would never by the combo lights /use a hi pressure sodium for both vegative state and flowering.you dont necessarily need a MH..

Jan 03, 2010 | Garden

1 Answer

Acer Crystal Eye webcam


look, delete this acer Crystal Eye webcam then download new one free from google , write acer crystal eye webcam download then choose one... your problem FIXED ! your fixer ,
fixer lover

Feb 25, 2009 | Acer Aspire 3610 Notebook

1 Answer

My Crystal Eye shows horizontal lines when taking pictures


this lines are came from touching the crystal eye ! so use your warranty to go to repair your crystal eye or they will change it. your fixer ,
fixer lover

Feb 21, 2009 | Acer Aspire 3610 Notebook

1 Answer

Pictures


It's quite complicated to explain in detail, and there are a number of different processes, but I can start by saying how the essential chemistry of B&W processing works.

A film emulsion contains tiny crystals of a silver halide (Silver chloride, bromide etc.) contained in a layer of gelatin, coated on a plastic backing. Silver halides are sensitive to light.

There are other layers such as an anti-reflection layer behind the light sensitive layer to prevent light being scattered back to produce a 'halo' around bright areas, (Anti-halation layer) and a scratch resistant layer on the front.

Additionally dye chemicals are added which enhance the halides sensitivity to red light, to which otherwise it would be insensitive. These are known as dye sensitisers.

Only imprefections in the crystals are actually sensitive, as these contain silver ions which are not fully bound to the halogen. When a photon interacts with the crystal near the sensitve site an electron is released which can reduce the ion to a single atom of silver.

These single atoms ar enot enough to produce a visible image, but comprise a latent image within the emulsion. In order to make the latent image visible we must amplify the latent image in some way. This is done chemically by a process known as development.

There are a number of chemicals formulations which can be used as developers (including urine!), but all are chemical reducing agents. (Opposite of oxidising agents.) These convert the silver halide to metallic silver.

It so happens that for many reducing agents metallic silver acts as a catalyst, so where there is silver the reaction proceeds faster than where there is not. Of course as more silver is produced the greater the catalytic action, so the develoment process accellerated as it progesses.

This forms clumps of silver around the original silver atoms. These clumps consist of very small grains of silver, finer than any powder and these appear black. These form a negative image. (Black where light fell on the film.)

(These tiny grains are not what photgraphers refer to as 'grain'. In fact the 'grain' in a photograph is more to do with the distribution of development sites, and the random nature of the arrival of individual photons.)

Most developers are realtively benign chemicals but some are toxic and carcinogenic. These are not used much these days but are still availble.

Unfortunatley this is quite a slow process, and there is a tendency to also reduce unexposed halides somewhat. This produces an overall 'fog' to the immage. To minimise this and speed the process up an accellerator is usally added.

Accellerators are alkalis. Some formulas use quite strong alkalis like sodium hydroxide, but others use rather innoccuos substances like borax.

Development continues until the developing chemical is removed or the chemicals are exhausted. If the film is developed too much than the silver clumps begin to overlap and you get a completly black area. Further development does not make those areas any blacker even if more silver is produced!


This process is of course conducted entirely in darkness.

Most formulations use both developer and acellerator together, but sometimes these are used separatley to give better controll of the negative density. Here the emulsion is soaked in the developer, and transferred to the accellerator bath. This limits the amount of developer in the negative so heavily exposed areas do not develop as much. This allow a scene with a wider range of brightness to be recorded.

(Note that the film itself can record a much wider range in the latent image, than can be developed.)

Normally development is stopped by immersing the film in an acidic bath, which reacts with the accellerator as well as washing away developer.

The anti-halation layer dyes are usually washed out during develpment.

Of course this still leaves undeveloped silver halides in the emulsion. These are removed by fixing the image.

This is necesary for two reasons. First in a film the halide crystals have a whilte milky appearance. You need light to shine through a film duing enlargement, so that's no good. Alxo the halide will eventually turn black on exposure to light.

Fixing the image usually is a matter of washing the negative in a soultion of sodium thiosuphate. (Comonly called 'hypo'.) Silver halides are only very poorly soluble in water, but sodium thiosulhpates affinity for soft metal ions overcomes this reaction with the silver, to produce sodium halide. If this is silver chloride you get salt!)

To get a print, you expose paper treated on one surface with an emulsion, to a projected image of the enlarger and develop that in a similar way.

So there you have it. Color is a bit more complicated involving layer with different sesitivity to colored light, and dyes which are produced by the action of delvelopers.

For more details start with http://en.wikipedia.org/wiki/Photography

Jan 13, 2009 | Fuji Endeavor 200ix Zoom APS Point and...

1 Answer

Opening the crystal eye webcam


Download new one from google write 'acer crystal eye webcam download' and its For FREE !
Your Fixer,
Fixer Lover

Jan 02, 2009 | Acer Aspire 3610 Notebook

Not finding what you are looking for?
Cameras Logo

Related Topics:

117 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cameras Experts

kakima

Level 3 Expert

102366 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

yadayada
yadayada

Level 3 Expert

76848 Answers

Are you a Camera Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...