Book capable of hiding and displaying partial words for multiple times

Abstract

The present invention relates to one kind of book with partial text capable of being hidden and emerging for several times. The book has contents including 'questions' printed in common print ink and 'answers' printed in invisible ink and being invisible normally in the air. The book forces the reader to think for finding out the answers to the questions, and if necessary, the printed 'answer' may be shown with the matched developing brush and alkali developing solution for some time, and the appearance and disappearance of the 'answer' is repeated for many times. The present invention can strength the memory of the reader and raise learning efficiency.

Description

1. Technical field:

[0001] The invention relates to a novel book, which belongs to the field of stationery and educational supplies. It specifically refers to a book in which part of the handwriting can be hidden and revealed many times. The content of the book is compiled into the form of "questions" and "answers". Printing, the words printed with invisible ink will naturally fade in the air and the writing disappears; therefore, readers usually only see the "question" but not the "answer", which forces the reader to think about the "answer" to the "question", and really want to When you are not out, you can use the easy-to-carry color-developing soft pen with built-in alkaline color-developing solution to display the words on the "answer", and then the handwriting will disappear naturally. If needed, the "answer" can be displayed again with a color-developing soft pen. In this way, it can be hidden and displayed multiple times. The book can be designed as a pocket size, w...