After some discussion, we came up with a plan. The book is now finished and this is it:
Close-up of the silk & linen.
Rainbow pages and a hard cover, with a stiff spine.
Close-up view of the hand-stitched headband (that stripey bit at the top & bottom of the pages).
The end-papers are shiny silver.
It's not exactly paper - more a shimmery thin plastic film, but it works really well.
The back of the end-papers has a matt finish.
Red pages come first - each page has a punched, decorative edge.
Orange and yellow pages...
Turquoise and aqua - and you can see the other colours before & after these pages - there are ten colours in all, with a total of sixty pages.
It's finished and the customer Loves it!
The only thing that I still have to do, is make and print a lino-cut label, with a rainbow and the Happy Couple's names & wedding date. Work in progress...