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Neogravure

Any suggestions?

I have seen the patent papers in Melbourne (Vic) of 1878 and it is listed as a 'photographic process' no further details.

I suspect that it was a business limiter with no real existence!!

Many thank

John Davies

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Retouching techniques

As a complete novice when it comes to photographic techniques could someone tell me if there is term for the procedure which seems to have been used mainly in newspapers from the early to the middle of the twentieth century in which photographs were

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Stereo camera c.1910

I'm looking for help with identifying the stereo camera technology in use in the first of these images. The picture shows Belgian photographer and ecologist Jean Massart in 1911. Not a great image I know, but all I have to go on.

The stereo pictures

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