Why does the clarity of the scale markings engraved on the inside of the measuring cup differ between individual products?

When looking down into a NODA HORO measuring cup, the first parts you encounter are the scale markings wrapped around the inner wall and the sharply opened spout^[1]. However, these printed markings may not be as completely sharp as printed paper matter^[2]. The thickness or darkness of the lines may appear differently for each individual product^[3].

The reason lies in the material. This measuring cup is made of enamel, which is created by applying a glass glaze onto a metal surface and baking it in a high-temperature kiln^[4]. Generally, enamel is a material that adds the smoothness of glass to the sturdiness of metal, but fine curves and unevenness naturally form on the surface during the process in which the glaze hardens. Because it is a base on which it is difficult to print straight lines like paper or plastic, smudging or blurring occurs on each vessel when the pigment is applied and baked^[5].

The internal scale markings and spout are a practical setup designed so that you can conveniently beat egg mixtures or measure liquids for baking and pour them directly into another bowl^[6]. Since it is an everyday cooking tool rather than a precision laboratory instrument, even if there is slight smudging, it is fully adequate for its original purpose of measuring and pouring^[7][8]. hmmm, rather than markings stamped out identically from a factory, it can also be viewed as the natural texture unique to an enamel vessel through which glaze and heat have passed.