Reversal Processing and Enlarged Negatives

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The other two methods both require a positive image, which is then projected onto another piece of film of the desired final size using an enlarger. This second piece of film is developed as a negative. 

There are a number of ways to process your film as a positive the easiest would be to send it to a lab such as. dr5 Chrome Lab (see Resources) and the next would be to purchase a reversal processing kit from Photographers Formulary or Kodak and follow the directions. 

The second method for creating a positive requires an interpositive (also known as dia-positive) to be made from the original negative. The interpositive is made by contact printing the original negative onto another piece of film. 

On the other hand, if the initial image was thin, as in an underexposed negative, then the exposure would not have extended as far into the emulsion and the resulting image after secondary development will have more density. 

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There is not a lot of leeway for over- or underexposure when using the reversal process. However, experience shows that a slightly overexposed negative works better for scans and enlarged negatives. 

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