There are many different types of idiopathic headache with the pain in the back of the head, including epicrania fugax, nummular headache, cluster headache, and hemicrania continua. There is also a condition termed new daily persistent headache, which also belongs to this type and can cause a headache for several months.
Calculate Use: Multiply the number of pages per week (the average in a production environment is 100) by the number of weeks in a six-month period (26). A good estimate is that you will print 2,600 pages each six months. Now, take 2,600 and divide it by the number of pages the ink cartridge will print (225).
Recycled cartridges produce the same quality and output as new cartridges. Ink cartridges are constructed out of plastic, petroleum-based products and take about 1,000 years to decompose. According to recent estimates, 20-40% of ink cartridges are recycled, meaning 60-80% end up in landfills.