>It is possible to take a soft covered Velo-bound book, remove the old binding and cover, and re-bind it with a hard cover, which may be pre-embossed for more a more impressive appearance. This rapid up-grade was the cause of the short-lived motto "Soft to hard in 30 seconds!" That was first done when the firm was located in Sunnyvale, California.
https://en.wikipedia.org/wiki/VeloBind
>It is possible to take a soft covered Velo-bound book, remove the old binding and cover, and re-bind it with a hard cover, which may be pre-embossed for more a more impressive appearance. This rapid up-grade was the cause of the short-lived motto "Soft to hard in 30 seconds!" That was first done when the firm was located in Sunnyvale, California.