wolfgang_reinhard

Dear Jon,

<p>

I see one possibility. You can use a so called intensifier. The

problem is that most of them are at least hazardous.

I found a formula which looks not as dangerous. It is a silver

intensifier.

Solution A: citric acid 3 g

Hydroquinone 3 g

water 1000 ml

Solution B: silver nitrate 5 g

water 100 ml

Short before usage mix up 100 ml of solution A with 10 ml of solution

B. This mixture is not very stable. After intensifiing the negative it

shall be washed for a short time. After that treat it for 2 min with

a fresh acid fixer. After rinse well. Treatment time: as required.

Regards

Wolfgang

Hello Kevin,

<p>

your idea is not as wrong as it seems. Tetenal offers a B&W film

developer for such a processing but I do not know the details. It is

called Emofin. I do not know if you get it in the USA.

<p>

Regards

Wolfgang

Hi Paul,

<p>

I have some connections to France. I got the information that you can

buy Agfa APX 100 in France. It is not as wide spreaded as Kodak but

mostly avbailable.

Hope this info helps you.

<p>

Regards

Wolfgang

Hi grey wolf,

<p>

Ii is not recommendable to rinse your slides after using the final

bath. This bath contains substances which stabilize your slides.

If you rinse your slides you wash out these substances.

These substances prevent fading especially of the magenta coupling

compound. That means that your slides will show a green color cast

after a short time of storage since the magenta coupling compound will

be destroyed.

<p>

Wolfgang

Hello Ahmad,

<p>

are you sure you mean C-6 since I do not know such a process. If you

mean E-6 which is the reversal film process than you mihgt get wrong

colours and slides with a low contrast. The effect depends on the

film you are using.

<p>

Regards

Wolfgang

Dear F,

<p>

During the exposure a latent image wil be build. This latent image is

invisible. To make it visible you need a process which is a kind a

intensity. This process is called development. During the development

the silverhalide crystals which are exposed will be reduced to

metallic silver. Two criterias are important that photographic

emulsions can be developed:

The exposed crystals must developed faster than the unexposed so that

there is a differentiation between exposed/unexposed.

An electrochemical precondition for a development is that there is a

potential difference. That means the redox potential of the developing

system has to be more negative than the silver ion Ag+/metalic silver

Ag.

On the other hand the potential difference should not be to negative.

Otherwise there would not be a differentiation between exposed and

unexposed crystals.

There is much more to explain but it would be to much for the moment,

I guess.

If you would like to have more information please contact me. I try to

answer your queries as good as I can.

<p>

Regards

Wolfgang