storability of plates

[kevin klein]

Can coated plates be be safley stored if the emulsion does not contain any presrvatives or bactiriside? What should be used for a preservative if needed and how much shuld be used per batch? Is the content determined by the amount of gelatin in the emulsion?

Thanks.

 

[Photo Engineer]

They can be stored with no preservative, if the emulsion is in a dry place.

For a preservative, the hardener can help and you can add thymol as well. Use about 1 drop per 100 grams of emulsion of a 10% solution of thymol.

Yes, the amount is based on gelatin and assumes an aldehyde hardener. I assume 10% gelatin.

PE