APUG - View Single Post - Kodak SH-1 Formalin Hardener for Films and Plates

FilmIs4Ever · 07-06-2008, 04:25 PM

Water - 16 fl. oz. - 500mL - 20 fl. oz.
Formalin (40% Formaldehyde solution) - 2 1/2 fl. dr. - 9.75mL - 3 1/8 fl. dr.
Sodium Carbonate - 73 grains - 5g - 87 1/2 grains
Water to make - 32 U.S. fl. oz. - 1L - 40 Imp. fl. oz.

U.S. Customary units given are exact. Metric measures are accurate to within 250µL or 250 mg. Imperial units accurate to within 1/4 gn., 1/8 fl. dr.

NOTE: SINCE THIS FORMULA WAS PUBLISHED, FORMALDEHYDE HAS BEEN CLASSIFIED AS A PROBABLE CARCINOGEN, AND EXTREME CARE SHOULD BE EXCERCISED IN ITS USE.

Hardening prevents excessive softening of the emulsion. It also prevents the emulsion from slipping off the film base and reduces the possibilities of reticulation. The hardener prevents an increase in film "grain."

This hardener is recommended for the treatment of negatives which would normally be softened considerably by a chemical treatment. It prevents excessive swelling of the emulsion and should be used before reducing or intensifying a negative. Immerse the film in this solution for about 5 minutes, and rinse it well before further treatment.

07-06-2008, 04:25 PM	#1 (permalink)
FilmIs4Ever Join Date: Jan 2004 Location: Cleveland, OH Posts: 272	Kodak SH-1 Formalin Hardener for Films and Plates Water - 16 fl. oz. - 500mL - 20 fl. oz. Formalin (40% Formaldehyde solution) - 2 1/2 fl. dr. - 9.75mL - 3 1/8 fl. dr. Sodium Carbonate - 73 grains - 5g - 87 1/2 grains Water to make - 32 U.S. fl. oz. - 1L - 40 Imp. fl. oz. U.S. Customary units given are exact. Metric measures are accurate to within 250µL or 250 mg. Imperial units accurate to within 1/4 gn., 1/8 fl. dr. NOTE: SINCE THIS FORMULA WAS PUBLISHED, FORMALDEHYDE HAS BEEN CLASSIFIED AS A PROBABLE CARCINOGEN, AND EXTREME CARE SHOULD BE EXCERCISED IN ITS USE. Hardening prevents excessive softening of the emulsion. It also prevents the emulsion from slipping off the film base and reduces the possibilities of reticulation. The hardener prevents an increase in film "grain." This hardener is recommended for the treatment of negatives which would normally be softened considerably by a chemical treatment. It prevents excessive swelling of the emulsion and should be used before reducing or intensifying a negative. Immerse the film in this solution for about 5 minutes, and rinse it well before further treatment. Last edited by FilmIs4Ever; 07-06-2008 at 07:16 PM.