With the ink flow restored, head back to the 'Ink Machine' room. You'll notice a large lever on a panel near the machine. Interact with this lever to finally activate the Ink Machine. As the machine rumbles to life, the studio will shake, and ink will begin to flow through the pipes. The atmosphere will become even more oppressive.
After activating the machine, a cutscene will play, and you'll witness the Ink Machine's true, horrifying power. The path back to the exit will be blocked by wooden planks, forcing you to find an alternate route. This is where the true horror of Joey Drew Studios begins. Be prepared for your first encounter with the Ink Demon. The activation of the machine is a pivotal moment, marking the transition from exploration to survival horror. Ensure you've explored thoroughly before this point, as some areas may become inaccessible or more dangerous.