Technical Innovations
His technical innovations included:
- Improvements on paper negatives, specifically waxing them before exposure "making the paper more receptive to fine detail".
- A collodion process published in 1850 but which was "theoretical at best". The invention of the wet collodion method to produce a negative on a glass plate is now credited to Frederick Scott Archer who published his process in 1851.
- Combination printing, creating seascapes by using one negative for the water and one negative for the sky at a time where it was impossible to have at the same time the sky and the sea on a picture due to the too extreme luminosity range.
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