How Bosses Turn Work Into Profit — Das Kapital

Marx crosses the threshold from market to workshop. The purchaser of labour-power consumes it by setting the worker to produce. In the labour-process, human activity reshapes materials into use-values under the capitalist's direction, using means of production that transfer their old value while living labour adds new value.

The same process, viewed from value's side, becomes the production of surplus-value. The worker labours longer than the time required to reproduce the value of labour-power. That extra stretch is surplus labour, and its objectified form is surplus-value.

Marx walks through examples from spinning to machinery to show how constant capital passes into the product while variable capital expands through living labour. The chapter closes with co-operation. Even simple teamwork raises productivity and disciplines workers into a collective organism commanded by capital. Production is never merely technical. It is a social form in which the buyer's control over combined labour becomes the lever for extracting unpaid work.

The working-day analysis makes exploitation measurable in hours rather than moral outrage, and that shift is what lets Marx compare factory legislation, home work, and modern productivity targets on the same structural terms.