Method of manufacturing an aluminum base photographic surface

Claim 1

A METHOD OF PRODUCING AN ALUMINUM PHOTOGRAPHIC SHEET WHICH COMPRISES THE STEP OF SUBJECTING A SHEET OF PURE ALUMINUM TO ANODIC TREATMENT IN A SOLUTION OF OXALIC ACID AND OXALATES MADE BY DISSOLVING 250 GRAMS OF POTASSIUM OXALATE IN 10 LITERS OF DISTILLED WATER WITH ADDED OXALIC ACID TO A HYDROGEN EXPONENT OF PH 1-6 WITH A CURRENT DENSITY OF 9/,/ AMPERE PER SQUARE INCH FOR 45 TO 60 MINUTES AT A TEMPERATURE OF APPROXIMATELY 45%C., AGITATING THE ELECTROLYTE DURING SUCH TREATMENT PASSING AIR THERETHROUGH, ADDITIONALLY AGITATING THE ELECTROLYTE BY ULTRASONIC VIBRATION OF APPROXIMATELY .75 WATT PER SQUARE INCH AT 25 TO 40 KC., RINSING THE SHEET IN DISTILLED WATER, FURTHER ANODICALLY TREATING THE SHEET IN AN ELECTROLYTE SOLUTION OF 5 PERCENT BORIC ACID OF &'' 1-6 FOR A PERIOD OF 15 TO 20 MINUTES AT A CURRENT DENSITY OF .100 AMPERE PER SQUARE INCH AT A TEMPERATURE OF APPROXIMATELY 50%C. WHILE AGITATING THE ELECTROLYTE BY THE PASSAGE OF AIR THERETHROUGH AND ADDITIONALLY BY ULTRASONIC AGITATION, RINSING THE SHEET, IMMERSING THE SHEET IN A 5 PERCENT SOLUTION OF BICARBONATE OF SODA TO NEUTRALIZE ANY RESIDUAL ACID, AGAIN RINSING THE SHEET IN DISTILLED WATER, DRYING THE SHEET AT A TEMPERATURE OF APPROXIMATELY 50%C., IMMERSING THE SHEET IN AN AQUEOUS SOLUTION OF 5 PERCENT 2,4-DICHLOROL-1NAPTHOL ADJUSTED TO A PH OF 6.8, AT A TEMPERATURE OF APPROXIMATELY 45%C. FOR A PERIOD OF APPROXIMATELY FIFTEEN MINUTES, AGAIN RINSING THE SHEET, IMMERSING THE SHEET WHILE STILL WET IN A 5 PERCENT SOLUTION OF SILVER NITRATE HAVING A SLIGHT EXCESS OF AMMONIA ADDED FOR APPROXIMATELY SIXTY MINUTES, RINSING THE SHEET IN DISTILLED WATER AND DRYING THE SAME AT A TEMPERATURE OF APPROXIMATELY 50%C., IMMERSING THE SHEET IN A SOLUTION OF 3 GRAMS OF POTASSIUM PERMANGANATE AND 6.25 GRAMS OF POTASSIUM FERRICYANIDE DISSOLVED IN 500 CCS. OF DISTILLED WATER FOR A PERIOD OF FIVE MINUTES AT A TEMPERATURE OF FROM 18%C. TO 20*C. TO OXIDIZE THE PRECIPITATED METALLIC SILVER, RINSING THE PLATE AND IMMERSING THE SAME IN A RIPENING SOLUTION COMPRISED OF 10 GRAMS OF OXALIC ACID, 6.25 GRAMS OF POTASSIUM BROMIDE, 3 GRAMS OF SODIUM CHLORIDE AND .025 GRAM OF AMMONIUM IODIDE DISSOLVED IN 500 CCS. OF DISTILLED WATER, TO FORM LIGHT-SENSITIVE HALIDES, RINSING IN DISTILLED WATER AND IMMERSING THE SHEET IN A SOLUTION OF 9 GRAMS OF POTASSIUM FERRICYANIDE AND 3.5 GRAMS OF POTASSIUM BROMIDE PER LITER OF DISTILLED WATER, AND FINALLY FORCE DRYING THE PLATE AT APPROXIMATELY 60%C.

Claim 2

A METHOD OF PRODUCING AN ALUMINUM PHOTOGRAPHIC SHEET WHICH COMPRISES THE STEP OF SUBJECTING A SHEET OF PURE ALUMINUM TO ANODIC TREATMENT IN A SOLUTION OF OXALIC ACID AND OXALATES MADE BY DISSOLVING 250 GRAMS OF POTASSIUM OXALATE IN 10 LITERS OF DISTILLED WATER WITH ADDED OXALIC ACID TO A HYDROGEN EXPONENT OF PH 1-6 WITH A CURRENT DENSITY OF 9/,/ AMPERE PER SQUARE INCH FOR 45 TO 60 MINUTES AT A TEMPERATURE OF APPROXIMATELY 45%C., AGITATING THE ELECTROLYTE DURING SUCH TREATMENT PASSING AIR THERETHROUGH, ADDITIONALLY AGITATING THE ELECTROLYTE BY ULTRASONIC VIBRATION OF APPROXIMATELY .75 WATT PER SQUARE INCH AT 25 TO 40 KC., RINSING THE SHEET IN DISTILLED WATER, FURTHER ANODICALLY TREATING THE SHEET IN AN ELECTROLYTE SOLUTION OF 5 PERCENT BORIC ACID OF &'' 1-6 FOR A PERIOD OF 15 TO 20 MINUTES AT A CURRENT DENSITY OF .100 AMPERE PER SQUARE INCH AT A TEMPERATURE OF APPROXIMATELY 50%C. WHILE AGITATING THE ELECTROLYTE BY THE PASSAGE OF AIR THERETHROUGH AND ADDITIONALLY BY ULTRASONIC AGITATION, RINSING THE SHEET, IMMERSING THE SHEET IN A 5 PERCENT SOLUTION OF BICARBONATE OF SODA TO NEUTRALIZE ANY RESIDUAL ACID, AGAIN RINSING THE SHEET IN DISTILLED WATER, DRYING THE SHEET AT A TEMPERATURE OF APPROXIMATELY 50%C., IMMERSING THE SHEET IN AN AQUEOUS SOLUTION OF 5 PERCENT 2,4-DICHLOROL-1NAPTHOL ADJUSTED TO A PH OF 6.8, AT A TEMPERATURE OF APPROXIMATELY 45%C. FOR A PERIOD OF APPROXIMATELY FIFTEEN MINUTES, AGAIN RINSING THE SHEET, IMMERSING THE SHEET WHILE STILL WET IN A 5 PERCENT SOLUTION OF SILVER NITRATE HAVING A SLIGHT EXCESS OF AMMONIA ADDED FOR APPROXIMATELY SIXTY MINUTES, RINSING THE SHEET IN DISTILLED WATER AND DRYING THE SAME AT A TEMPERATURE OF APPROXIMATELY 50%C., IMMERSING THE SHEET IN A SOLUTION OF 3 GRAMS OF POTASSIUM PERMANGANATE AND 6.25 GRAMS OF POTASSIUM FERRICYANIDE DISSOLVED IN 500 CCS. OF DISTILLED WATER FOR A PERIOD OF FIVE MINUTES AT A TEMPERATURE OF FROM 18%C. TO 20*C. TO OXIDIZE THE PRECIPITATED METALLIC SILVER, RINSING THE PLATE AND IMMERSING THE SAME IN A RIPENING SOLUTION COMPRISED OF 10 GRAMS OF OXALIC ACID, 6.25 GRAMS OF POTASSIUM BROMIDE, 3 GRAMS OF SODIUM CHLORIDE AND .025 GRAM OF AMMONIUM IODIDE DISSOLVED IN 500 CCS. OF DISTILLED WATER, TO FORM LIGHT-SENSITIVE HALIDES, RINSING IN DISTILLED WATER AND IMMERSING THE SHEET IN A SOLUTION OF 9 GRAMS OF POTASSIUM FERRICYANIDE AND 3.5 GRAMS OF POTASSIUM BROMIDE PER LITER OF DISTILLED WATER, AND FINALLY FORCE DRYING THE PLATE AT APPROXIMATELY 60%C.