FRSC 2600 EXAM 4 QUESTIONS AND DETAILED CORRECT
ANSWERS WITH COMPLETE SOLUTIONS
pigments
colorant particulates that are suspended or dispersed in solvent matrix
additives
drying agents
plasticizers
anti foaming agents
antimicrobial agents
dispersing agents/surfactants
binders/resins
allows pigment to be distributed across the surface
solvents
ensures that the colorant is homogeneously suspended and delivered evenly to the
substrate
once pigment and additives are in place, it evaporates
automotive finishes
complex layering system
pretreatment
,primer
topcoat
clearcoats
pretreatment
steel surfaces of cars protected from corrosion by zinc-galvanization
primer
usually an epoxy resin w corrosion-resistant pigments
color coordinates w final color
topcoat
may be in the form of a single color layer coat, a multilayer coat or a metallic color coat
clearcoats
unpigmented coatings applied to improve gloss and durability of a vehicle's coating
art paints
coatings used in artistic compositions
forgery cases
paint chips
pieces of paint which have come off a surface
usually contain all of the layers of paint
paint smears
transfer of paint when a painted object strikes a glancing blow to another object
, collection
lifting loose flakes, cutting samples of paint, dislodge samples by bumping the opposite
side of the painted surface
Q samples
contain all loose or transferred paint materials
solvent and microchemical tests (paint)
performed on known and unknown (?) samples simultaneously
used to discriminate between paint layers w diff pigment and binder composition that
are visually similar
polarized light microscopy (PLM) - paint
exam of layer structure, comparison/identification of particles present (pigments,
extenders, additives, contaminants)
fluorescence microscopy
screening and analyzing paints
microspectrophotometry
categorize and discriminate between visually similar (metametric) parts
spectroscopy
IR/Raman
characterize colorants, binders, coatings, film former, pigments and additives
HPLC
alternative for pigments that won't GC well
ANSWERS WITH COMPLETE SOLUTIONS
pigments
colorant particulates that are suspended or dispersed in solvent matrix
additives
drying agents
plasticizers
anti foaming agents
antimicrobial agents
dispersing agents/surfactants
binders/resins
allows pigment to be distributed across the surface
solvents
ensures that the colorant is homogeneously suspended and delivered evenly to the
substrate
once pigment and additives are in place, it evaporates
automotive finishes
complex layering system
pretreatment
,primer
topcoat
clearcoats
pretreatment
steel surfaces of cars protected from corrosion by zinc-galvanization
primer
usually an epoxy resin w corrosion-resistant pigments
color coordinates w final color
topcoat
may be in the form of a single color layer coat, a multilayer coat or a metallic color coat
clearcoats
unpigmented coatings applied to improve gloss and durability of a vehicle's coating
art paints
coatings used in artistic compositions
forgery cases
paint chips
pieces of paint which have come off a surface
usually contain all of the layers of paint
paint smears
transfer of paint when a painted object strikes a glancing blow to another object
, collection
lifting loose flakes, cutting samples of paint, dislodge samples by bumping the opposite
side of the painted surface
Q samples
contain all loose or transferred paint materials
solvent and microchemical tests (paint)
performed on known and unknown (?) samples simultaneously
used to discriminate between paint layers w diff pigment and binder composition that
are visually similar
polarized light microscopy (PLM) - paint
exam of layer structure, comparison/identification of particles present (pigments,
extenders, additives, contaminants)
fluorescence microscopy
screening and analyzing paints
microspectrophotometry
categorize and discriminate between visually similar (metametric) parts
spectroscopy
IR/Raman
characterize colorants, binders, coatings, film former, pigments and additives
HPLC
alternative for pigments that won't GC well
