Granulated sugar is ground to a very fine powder and separated into lines for each flavour of Love Heart.
Colours, flavourings, and other ingredients are added and mixed, then fed into a machine where it is compressed under high pressure.
After the highlighting, the different colours and flavours are randomly mixed and packaged to create a variety for the consumer.
The main body of the sweet is in one of six colours: white, yellow, orange, green, purple or red.
Special edition Love heart packs were launched for Prince William and Kate Middleton's wedding in 2011.
[5] A competition was held by Swizzels Matlow Ltd for 10 new messages to be put on Love Hearts; the winning entries (announced on 22 July 2008) were "Think Pink", "Joyful Jo", "Granny P", "Me Julie Best Mum", "Juicy Jessie", "I Luv Alan", "Happy Harry", "Heart Baby", "Kin of U Home", and "Mermaid Eloise".
UK supermarket Asda produce a brand of sweets called 'Whatevers', in the style of Love Hearts, but with a range of British colloquial terms.