Ok my thread wasn't easy to understand. It's hard to digest.
Anyway it's all I saw in France. Yes, 'caux'. Or NHL naturally hydraulic lime.
Chaux Blanche is the white one. But normal chaux is still light in colour
It's the business. It's even better when left in a tub over night with a...
Lemme make this easy to understand. In Britain, lime is hydrated lime. It doesn't set. It's added to cement to soften it up and make it less hard and aggressive to soft bricks and stone.
In France, lime is hydraulic. It does set and no cement is added. Again the mortar is softer than rock hard...