During a three-hour ‘Seekho aur Samjho (SaS)’ workshop conducted by Vishnuu R Kamat of AGS at Government Institute of Printing Technology (GIPT) on 17 January, press operators, supervisors and students from Mumbai learnt basics of colour and correct usage of colour measurement devices.
This was the first in the series of SaS workshops organised by the Bombay Master Printers Association in association with PrintWeek India, GIPT and SIES Graduate School of Technology, Navi Mumbai.
Addressing to an audience of more than 80, Kamat initiated his lecture with two basic theories of colour vision: Trichromatic and Opponent theory and demonstrated how colour is perceived and processed by human eye and brain.He then spoke about the CIE system of colour measurement with standard observer, standard illuminant and primaries. Plus he demystified the LabCh model and the concept of colour temperature in detail.
The theory session was followed by practical demonstration of dotmeter, densitometer and spectrophotometer, their usage, applications and difference between each of the devices. Kamat was assisted by his colleagues for the practical session. “While densitometer is used to measure CMYK only, spectrophotometer measures colours beyond CMYK gamut including pantones,” said Kamat.
The Q&A session, which followed, attracted some interesting queries from the audience including one about measuring colour for MetPET substrate and metallic inks.
In order to register for SaS sessions, please write to admin@bmpa.org.
Seekho aur Samjho: Correct usage of colour measurement devices - Part Two
Seekho aur Samjho: Correct usage of colour measurement devices - Part Three