CKLT Thickness 0.08inch Super Durable Brass Protractor Ruler Angle Measure Tool Stationery Math Geometry Best Gift For Students And Children (protractor)

Description

Oxidation of copper has, after years of use, with sweat and air oxidation in full, the color will be deep dark, especially in the summer, particularly high temperature, will speed up the brass oxidation, especially the part of the hand, because have been contact with sweat, high temperature condition.So when the advice is first used, after each use, it is recommended to wipe with a paper towel, so that a small amount of sweat can be distributed evenly over the metal.After a long time, a protective layer of "pulping" is formed.Every month, it is recommended to use a paper towel for a small amount of vegetable oil (soybean oil, mixed oil, peanut oil, etc.) to polish the brass products.This way your brass product looks very good, has the feeling of old thing, has lasting appeal, has a sense of history!