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kevin klein
03-19-2007, 09:55 PM
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
03-19-2007, 10:14 PM
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