Chemical products included in Class 1 for preventing the contamination by algae of containers used for rinsing in chemo-photographical processes, but not including litharges, sulphur, zinc oxide or golden antimony sulphide.
Chemical products included in Class 1 for preventing the contamination by algae of containers used for rinsing in chemo-photographical processes, but not including litharges, sulphur, zinc oxide or golden antimony sulphide.
Chemical products included in Class 1 for preventing the contamination...