kev, we come across bleached patches every month from vanish and the likes and i would guess vanish has never been taken to court over it, its the customers fault for not reading the small print just as it would be the carpet cleaners fault for not doing a test area. i would guess that not one chemical supplier of carpet cleaning chemicals has ever been at fault for ruining a carpet, you just make sure you include the small print on your label.
seems to be 2 discussions going on here manufacturing your own label products and dodgy batches, i wasn't talking about dodgy batches, i was talking about liability for the manufacturer. as long as he puts his warning on the label then he is covered until he makes a dodgy batch then he is not. thats my take on it.