Sweatshops and factories differed only on size, the former being smaller. In the late 1800s all factories were dirty, dangerous, noisy, had little light, little space, little fresh air. Workers had to be in that unhealthy environment working up to 16 hour a day sometimes. Accidents happened often, the workers developed chronic diseases because of how much time had to be there, the conditions of work were almost slave-like, with the work overwatch by punitive owners.