How do you make homemade laundry detergent?

There are various reasons why you might want to make your own laundry detergent, whether for reasons of effectiveness, economy, skin care or ethical considerations. Every year in France, the average household uses 40 litres of commercial laundry detergent, which is often packed with synthetic fragrances and irritants (1). With a few simple ingredients and a bit of organisation, you can also make your own natural washing-up liquid in under 20 minutes. Recipes, measurements – find all our tips in this article.