The production technology is very simple and known to many. I want to share my experience.
All that is needed is newspapers, water, a bucket, gauze, and some utensils as a form and device for the press. I'll post only the last two things from the list, the rest is already clear.
We grind newspapers manually or with the help of a grinder (whoever works in the office, he probably has one). We insert gauze into the bucket (it should not only completely cover the bucket from the inside, but should also stick out about 15 cm outside). We fall asleep newspapers (it is easiest to work with a small volume: 3 kg of crushed newspapers in a 5 liter bucket). We mix the crushed mass with a copious amount of water in a bucket and leave for 10 hours (you can prepare the mixture before bedtime). After we carefully take out the cheesecloth and try to squeeze out as much water as possible (you can tie it up and squeeze it out in the washing machine, but do not forget that the water from the newspapers is dirty and it is better not to experiment). After spinning, put about 100 grams into the dishes and press. Carefully take out the resulting briquette and put on batteries for a day.