Campden tablets are an easy way for a new winemaker to add a measured dose of Metabisulphite to sterilise their must or protect the finished wine. They are traditionally Potassium Metabisulphite
Crush up 1 tablet for use per UK Gallon/4.5 Litres. It is an advantage to dissolve the crushed tablet in a small amount of cooled boiled jug water to add its dispersal into the wine. NB: We can supply a 1000 Pack of Campden to your request but please allow this is intended for a total of 4500 Litres of wine so is not practical for many home winemakers.
Bulk pack is marked as containing Sulphites, lactose and milk proteins.