TC1617
From ColorWiki
The TC1617 is a collection of CMYK patches commonly used in profiling CMYK devices like printing presses. It contains a good sampling of the entire printable gamut, as well as the neutrals that are commonly used to calculate gray balance using the G7 method.
TC1617 is how it is commonly referred to. The official name for this target is IT8.7/5.
See also:
https://www.idealliance.org/wp-content/uploads/2016/10/Curve4-G7_System_ADS_004.pdf
