Carbonless copying paper preparation

Fig. 10. Cross section of a three-part business form prepared from carbonless copy paper where are microcapsules and ...

Since the introduction of carbonless copying papers, CVL has undoubtedly found the most widespread use as a phthalide color former. Hence, it is appropriate to describe in detail the various approaches to its synthesis, particularly as they are representative of the preparations of various other phthalides described herein. 

Applications of microencapsulation in other industries are numerous. The best known microencapsulated products are carbonless copying paper, photosensitive paper, microencapsulated fragrances, such as scent-strips (also known as snap-n-burst ), and microencapsulated aromas ( scratch-n-sniff ). All of these products are usually prepared by gelatin-acacia complex coacer-vation. Scratch-n-sniff has been used in children s books and food and cosmetic aroma advertising. Microcapsules are also extensively used as diagnostics, for example, temperature-sensitive microcapsules for thermographic detection of tumors. ... 

The development of early encapsulation technology and preparation of microcapsules dates back to 1950s when Green and coworkers produced microencapsulated dyes by complex coacervation of gelatin and gum Arabic, for the manufacture of carbonless copying paper. The technologies developed for carbonless copy paper have led to the development of various microcapsule products in later years. 

Blythe, D., Churchill, D. Glanz, K. Stutz, J. 1999. Microcapsules for carbonless copy paper. In R. Arshady, ed. Microcapsules and Liposomes, Vol. 1 Preparation and Chemical Applications. London Citus 1999, pp. 421-439. 

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