What specifically is the 'enamelware for physical and chemical use' mentioned in the brand introduction?

'For physical and chemical use' refers to tools used when handling various reagents such as acids and alkalis in physics or chemistry laboratories. NODA HORO is an enamelware brand opened in Koto Ward, Tokyo in 1934 by Etsuji Noda^[1][2]. Acid-resistant enamel containers for physical and chemical use, along with household items, are official commercial items of NODA HORO^[3].

It is resistant to corrosion. Enamelware, produced by coating iron or metal surfaces with a vitreous glaze and baking it at high temperatures, has the property of having surfaces that do not rust or change even when coming into contact with strong acids. The strict conditions required of laboratory items, which must safely hold harsh chemical reagents, served as the foundation for this acid-resistance technology.

The time the homeware product line for households was introduced was 1976^[4]. The build quality of kitchen containers that neither retain odors nor discolor even when holding ingredients high in salt and acidity, such as kimchi or fermented pastes, was inherited from these laboratory containers. hmmm, meaning that storage containers placed on dining tables actually originated from vessels that endured the harsh conditions of the laboratory.