Methods and benefits of staining in the microscopy of consumer products
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Transcript of Methods and benefits of staining in the microscopy of consumer products
The Methods and Benefits of Staining in the Microscopy of
Consumer Products
Tom Kremer
DuPont Fiber Identification Stain No. 4
Acid Blue 298
Acid Red 182
Direct Blue 218
Disperse Orange 25
Disperse Yellow 3
Color Reactions
Nylon – red to reddish brown
Rayon – blue to blue-green
Cellulose acetate – orange
Polyester – pale yellow/yellow tan/beige
Acrylic – beige
Olefin – light tan to pale yellow
Color Reactions (contd.)
Wood pulp (chemically treated) – green
Wood pulp (mechanical) – red
Cotton (normal) – strong blue to blue-gray
Cotton (mercerized) – green
Glass – doesn’t stain
Silk – dark purple
Color Reactions
S/B latex – red
Polystyrene acrylate – yellow-gold
Ethylene vinyl acetate (EVA) – pale yellow
Polyvinyl acetate (PVA) – red
Osmium Tetroxide Vapor Staining