Most rapid access films do not require the use of added hardener. The emulsions are usually pre-hardened enough to withstand handling or processing. If hardener is needed, use enough Clayton Hardener to achieve the desired results.
A suggested ratio is two to four ounces of hardener per working strength gallon of fixer
The hardener is added to the fix process and is used to solidify the film or paper emulsion to the base. If toning is planed then the hardener should not be used.