Storage Containers for chemicals

Glass, hard rubber, polyethylene, enameled steel and stainless steel are the most commonly used materials for containers for mixing, storing and using photographic solutions. These materials are safe for ordinary solutions. The choice of material is determined primarily by economy, convenience, or size availability.

However, not all metals are suitable: Tin, copper and their alloys can cause serious chemical fog or rapid oxidation when used with developers. Aluminum, zinc, or galvanized iron should not be used with either developers or fixing baths.

Care should be taken with any vessel to avoid inaccurate volume measurements. When using a bottle, it is common practice to bring the solution to the final volume by filling to the top or neck of the bottle. In many cases, however, the so-called liter or quart bottles hold significantly more or less than the nominal volume. If such bottles are not calibrated, then they can cause errors in the strength of the solution.