Book convenient for answer correction

Abstract

The invention relates to printing product field, especially relates to a book whose local area uses special ink in order to facilitate the reader to correct answer. It is mainly made up of several pages, part of character and patterns are visual ink print; parts of character or pattern are invisible ink printing. The invisible ink includes at least one half invisible metal phthalocyanines dye fluorescence group; the fluorescence can absorb ultraviolet, infrared or far infrared, and emits out visible whose length is visible in a certain range; the book also has a pen will light source, which can emit out light that can be absorbed the fluorescence group, when the light irradiates the character or patterns printed with invisible ink, the character or pattern can be displayed.

Description

Technical field: [0001] The invention relates to the field of printing supplies, in particular to a book which partially uses special ink to facilitate users to correct answers. Background technique: [0002] Anyone who has done exercise books or exercise books in the reading era knows that the exercises that need to be filled in or the results are to be given are blank, and the practitioners need to think for themselves and fill in the top, usually in the last few pages of the exercise book. The answers to all the exercises are attached, so that when we finish the exercises, we can correct them according to the answers later. But when there are many exercises, using this method to correct the answers will inevitably delay a lot of time, and the pages of the book need to be turned back and forth constantly, and it is easy to misread the answers due to vertigo. [0003] In addition, some entertainment books, such as word maze games, idiom solitaire, or a kind of finding the ...

AI Technical Summary

Problems solved by technology

As shown in Figure 1, the printing method of this book is to use a chemical reaction to make the invisible ink appear in a different color from the page, so that the answer cannot be kept for a long time, and it is not conducive to the repeated use of the book. After one person uses it, others will read it directly. to the answer

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