Laundry Detergent (Marseille Soap)

We wash clothes with a home-made liquid made from Marseille soap flakes and water. Marseille soap works genuinely well here because our water is soft — in hard water it leaves limescale-soap residue, but that isn’t our situation.

Recipe (2 litres)

IngredientAmount
Marseille soap flakes100–120 g
Hot water2 litres
Washing soda (cristaux de soude) — optional1 tablespoon

The washing soda is only worth adding for greasy or heavily soiled loads. Plain soap and water is fine for everyday washing.

Method

  1. Dissolve the flakes in the hot water, stirring until no flakes remain.
  2. Let it rest 24 hours. It thickens and may separate — that’s normal.
  3. Whisk before every use so the gel is evenly mixed.

Dosing

Start low — 50–60 ml per load

Soft water needs noticeably less of everything. Start at 50–60 ml per load, not 100 ml.

Over-dosing is the main cause of residue on clothes and build-up in the machine, and with soft water you hit that threshold sooner than the back of a commercial detergent box would suggest.

If laundry comes out stiff or smelling soapy, cut the dose further.

Where it goes

MachineCompartment
Bosch Series 6 (first floor)Manual compartment on the left
Washroom off the kitchenTBD

See Laundry for the machines themselves.