GC 3460 MIDTERM GUIDE
chroma - Answers :intensity of color
what do we need to see color? - Answers :observer, object, light source
reflective object - Answers :used to measure printed ink
transmissive object - Answers :used on object that allow the light source to pass
through the substrate
emissive object - Answers :color comes from laptop monitor or phone.
hue - Answers :gradation or variety of a color, humans are the must sensitive to these
value - Answers :indicates the lightness of color (scale from black-white)
colors of low chroma are - Answers :weak
colors of high chroma are - Answers :strong
Lab - Answers :independent color space that defines color
L* (lab) measures - Answers :lightness from 0 (black) to 100 (white)
a* (lab) measures - Answers :redness and greenness
b* (lab) measures - Answers :yellowness and blueness
what are tests that help gauge color acuity or density? - Answers :Isharia Test and
Munsell-Farnsworth 100 Hue Test
spectrophotometer - Answers :measures spectral reflectance at various wavelengths
colormeter - Answers :Measures lab color through RGB filters (measures xyz values
that convert to lab)
densitometer - Answers :measures light reflectance using RGB filters only useful for
CMYK
density is measured using - Answers :RGB filters
brightness - Answers :the ability to reflect light, measured at 457 nm
whiteness - Answers :color balance + overall reflectance of the substrate
, cyan hue error - Answers :does a good job with red, but absorbs some of the blue and
green light, which it shouldn't transmit
yellow hue error - Answers :yellow has the least hue error
magenta hue error - Answers :does a good job removing green, but doesn't transmit
blue or green equally.
density is controlled by - Answers :the pigment load of ink and amount of ink on the
substrate
AM screening - Answers :amplitude modulated, regular halftone, dots vary in size, dots
equally spaced
FM screening - Answers :"Frequency modulated"
-Stochastic
• Dots same size
• Dots vary in spacing and randomly generated
print acuity - Answers :ability to print small details with percision
what are the types of densitometers? - Answers :transmissive and reflected
transmissive densitometers - Answers :measures the amount of light transmitted
through a transparent medium such as photographic film
reflected densitometers - Answers :measures the amount of light reflected back from a
surface (printed inks)
reflected density - Answers :a measure of the percentage of light reflected off of a
printed ink sample
densitometer filters - Answers :magenta-----green filter
cyan-----red filter
yellow------blue filter
Which attribute of color is represented below? - Answers :chroma
For LAB and LCH color, an L* value of. represents Black and an L* value. represents
White. - Answers :Black = 0
White= 100
In discriminating between colors, everyone sees the same differences in lightness, in
chroma and in hue angle. - Answers :True
chroma - Answers :intensity of color
what do we need to see color? - Answers :observer, object, light source
reflective object - Answers :used to measure printed ink
transmissive object - Answers :used on object that allow the light source to pass
through the substrate
emissive object - Answers :color comes from laptop monitor or phone.
hue - Answers :gradation or variety of a color, humans are the must sensitive to these
value - Answers :indicates the lightness of color (scale from black-white)
colors of low chroma are - Answers :weak
colors of high chroma are - Answers :strong
Lab - Answers :independent color space that defines color
L* (lab) measures - Answers :lightness from 0 (black) to 100 (white)
a* (lab) measures - Answers :redness and greenness
b* (lab) measures - Answers :yellowness and blueness
what are tests that help gauge color acuity or density? - Answers :Isharia Test and
Munsell-Farnsworth 100 Hue Test
spectrophotometer - Answers :measures spectral reflectance at various wavelengths
colormeter - Answers :Measures lab color through RGB filters (measures xyz values
that convert to lab)
densitometer - Answers :measures light reflectance using RGB filters only useful for
CMYK
density is measured using - Answers :RGB filters
brightness - Answers :the ability to reflect light, measured at 457 nm
whiteness - Answers :color balance + overall reflectance of the substrate
, cyan hue error - Answers :does a good job with red, but absorbs some of the blue and
green light, which it shouldn't transmit
yellow hue error - Answers :yellow has the least hue error
magenta hue error - Answers :does a good job removing green, but doesn't transmit
blue or green equally.
density is controlled by - Answers :the pigment load of ink and amount of ink on the
substrate
AM screening - Answers :amplitude modulated, regular halftone, dots vary in size, dots
equally spaced
FM screening - Answers :"Frequency modulated"
-Stochastic
• Dots same size
• Dots vary in spacing and randomly generated
print acuity - Answers :ability to print small details with percision
what are the types of densitometers? - Answers :transmissive and reflected
transmissive densitometers - Answers :measures the amount of light transmitted
through a transparent medium such as photographic film
reflected densitometers - Answers :measures the amount of light reflected back from a
surface (printed inks)
reflected density - Answers :a measure of the percentage of light reflected off of a
printed ink sample
densitometer filters - Answers :magenta-----green filter
cyan-----red filter
yellow------blue filter
Which attribute of color is represented below? - Answers :chroma
For LAB and LCH color, an L* value of. represents Black and an L* value. represents
White. - Answers :Black = 0
White= 100
In discriminating between colors, everyone sees the same differences in lightness, in
chroma and in hue angle. - Answers :True
