Several lots of oranges but finally have a batch that set althou noticed the peal was a little tougher maybe because boiled little longer...well twice, never cook well when things on mind
Found a Delia Smith recepe which turns whole thing on its head - you boil the whole orange first then leave overnight to complete the sugar part next day... advantage maybe long process broken down so less formidable and muslin bag with pith has chance to cool so not tooo hot for squeezing out the pectin
http://www.deliaonline.com/how-to-cook/preserves/how-to-make-marmalade.html
Architecton
5 days ago