When storing documents: avoid getting wet by water, oil or other stolen goods, avoid overlapping or stacking with other hard objects, keep the surface of documents clean and store them in a dry place! Generally, it will not turn yellow and rust within two years. (The premise is that the files you use are rusted, and the general small file manufacturers do not have the ability to rust the files, or only a part of them. ) The conventional file antirust method is carried out according to the following steps:

(1) First, put the quenched file in hot acid for 2 hours, (2) then put it in cold acid for 24 hours, (3) take it out and carry out surface sandblasting, (4) finally apply antirust oil and control drying to package.

Note: Generally, small workshops do not have these measures, and some even use anti-rust paint for anti-rust treatment (the most primitive anti-rust method).

The hardness and rust-proof ability of the file produced by small workshops can not reach, and it will rust and become dull after being used for a period of time. Affect the archiving effect. It is recommended that you choose a well-known manufacturer to purchase this file. Domestic brands (Quangong, Gong Hu, Flying Arrow, Double Arrow) do a good job in workmanship and rust prevention! Note that there are many fakes! Keep your eyes open when you buy!