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Since all print cartridge manufacturers used to use different testing methods, comparing suppliers had never been an easy thing to do.

In recent years this situation has changed. Requirements for tests of monochrome inkjet cartridges put in place by the International Standards Organization (ISO) were adopted by most of the companies that supply ink in the summer of 2004.

The ISO works to create industry standards that allow consumers to rate and compare competing products in a fair and unbiased manner.

Printer cartridge standards allow you to compare ink manufacturers’ products. Since the same methods are used to ascertain the yield derived from cartridges, they are much easier to compare against each other.

The standardization by the ISO specified these points:

- Default settings must be used when printing test examples.

- The tests are performed under strict temperature controls

- Both the cartridges and the printers used for testing must be available to the average consumer

- 9 of each cartridge must be tested for statistical validity

- 3 cartridges must be tested on 3 different printers to eliminate a single printer causing the numbers to be skewed

When considering which ink supplier you want to offer your business to, think about reliability, overall quality, and delivery in addition to numbers produced by testing.

If you do a fair bit of printing, you can also keep your own notes about different suppliers to see which ones last the longest and are the most cost efficient.