What is plain code and secret code? Seek answers.

Code: Code refers to the page number that is not printed on the page. Although the page number is not clearly marked, it should be allocated, that is, when numbering each page, the page numbers printed on the clear pages before and after the code page are discontinuous, and the serial number allocated to the code page should be skipped in the middle. The application scope of the secret code is usually the blank surface that must be left when compiling the seal, chapter page and another page.

Null code: Null code means no page number. For example, for inserts such as ring linings, insert pages, additional title pages, main title pages, etc. , the blank code has no page number. It should be noted that although the number of pages in the blank code is not numbered, the total number of pages should be included when calculating the amount of paper used for books and periodicals.

Clear code: Clear code refers to the page number clearly marked on the page. Is the most common form of page numbers.