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Is there a way to produce a microscopic film on a glass slide because I am trying to create a stanhope. For example in the image shown below, the image film is around 3 - 4mm.

And also is it possible to produce this in a large batch? What kind of materials and tools do I need to produce something like this? enter image description here

  • Is that glass or a polymer? There is a chance that you can use photographic transparencies, or another photographic film and cover it in some kind of epoxy resin. You probably need to do some tests to see if the heat does not damage the film or the emulsion. – Rafael Aug 12 at 20:38
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Specific to the image itself, there are two photographic technologies that can produce the high resolution, nearly grain-free images you need for a Stanhope type viewer in the original size (roughly like half an 8mm movie frame).

One is microfilm. Most microfilm stocks are designed to render extremely high resolution images at extreme contrast, but all or nearly all can also be processed in low-contrast developers (POTA, H&W Control, etc.) to give "pictorial" gray scale, while maintaining high sharpness and resolution. Complicating this is that you need a positive image: this can be obtained either by reversal processing the microfilm (develop, bleach the developed silver without removing the undeveloped halide, fog and redevelop, fix only as insurance), or by exposing the microfilm with a negative image, in this application typically from a larger film negative.

The other is one of the oldest forms of photography: wet collodion. In this case, you could clean your glass (very thoroughly), then coat, sensitize, expose, develop, and fix before the collodion can completely dry. Even though this is 1850s to 1870s technology, collodion is capable of extremely high resolution. Given that it is blue-sensitive only, a collodion Stanhope would need to be exposed with a silver image negative using blue or UV light, but that's a minor consideration compared to the effort of developing your collodion technique to the point of being able to produce Stanhope size slides.

For obvious reasons, I'd recommend microfilm. Develop a means of cutting this film in the dark, or exposing multiple slides onto the film at once (so you can cut after processing), and you could produce Stanhope slides (in black and white) cheaply and in quantity. With some optical trickery, you could even make multiple images from the same negative in a single exposure, improving throughput.

The optics needed will most closely resemble a commercial microfilm camera -- just a macro setup, similar to a slide duplicator, with the correct ratio between subject and image size (ideally, using a lens optimized for the ratio you're using, hence suggestion of a microfilm camera, or the lens from one). A macro lens on a suitably modified conventional camera would be another option.

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I'm not sure if you truly need glass. If you don't, look into transparencies. A regular inkjet printer should be able to give you positive prints on thin sheets of transparent plastic.

However, if you do need to print on glass, I would suggest you to use a spreadable light-sensitive emulsion such as Rollei Black Magic. Use masking tape or something similar if you want to create an image of a certain size on the glass, and spread the emulsion on this masked off area. Given the small print size, projecting as usual with an enlarger may not be feasible. With a small enough negative image, however, a contact print can be an option.

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  • A regular ink-jet printer can print on film that has been specially prepared to accept ink-jet inks. I don't think you can print on just any plastic film. – Solomon Slow Aug 12 at 12:09
  • Re, "Project...as usual" Except that a photographic enlarger might not be the right tool for producing such a tiny image. You really want an "ensmallener." In my mind, I am picturing a projector that you could make by hacking up a high-school laboratory microscope. Don't know how I would focus it though except by trial and error. – Solomon Slow Aug 12 at 12:22
  • @SolomonSlow that's correct, to some extent. Inkjet transparency sheets should have a layer on them to prevent smearing of the ink. However, I successfully printed on sheets without such a layer before. But yes, it's something to pay attention to – timvrhn Aug 13 at 6:59
  • @SolomonSlow a contact print may be possible. I will edit my post – timvrhn Aug 13 at 7:00
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    A regular inkjet at, effectively, no better than 600 ppi is going to be pretty blocky by the time the Stanhope gives it an apparent 20x magnification. – Zeiss Ikon Aug 13 at 14:31

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