In warm weather, the developer should be diluted; in cold weather, it should be stronger. {524}
The negative should not be exposed to white light until fixation is complete.
The negative should be left fully 5 minutes longer in the fixing bath than is necessary to dissolve out the white bromide of silver.
In hot weather a chrome alum fixing bath should be used to prevent frilling.
Always use a fresh hypo or fixing bath. Hypo is cheap.
Plates and plate holders must be kept free from dust, or pinholes will result.
After the negative is fixed, an hour’s washing is none too much.
The plate should be dried quickly in warm weather else the film will become dense and coarse-grained.
Do not expect clean, faultless negatives to come out of dirty developing and fixing solutions and trays.