AC is 4 time I order these cartridges on amazon, the first command does not alerted me, and 2nd, 3rd and 4th batch 4 cartridges me exactly 36 sheets color ....... here is it is far off indeed many say that the cartridges are half empty ..... I confirm this is a big disappointment !!!!!! So I tested my next order directly on the HP site certainly a little more, we'll see.