PPT - Importance Of Dyes and Pesticides | Chemical Technology - Chemical Engineering PDF Download

 Page 1


DYES AND 
PESTICIDES
22.3.1.DISCUSS THE IMPORTANCE OF DYES 
AND PESTICIDES
EHTISHAM UL HAQ
Page 2


DYES AND 
PESTICIDES
22.3.1.DISCUSS THE IMPORTANCE OF DYES 
AND PESTICIDES
EHTISHAM UL HAQ
IMPORTANCE OF DYES
• WHAT IS DYE:
Dyes can be said to be coloured, ionising
and aromatic organic compounds which 
shows an affinity towards the substrate to 
which it is being applied. It is generally 
applied in a solution that is aqueous. Dyes 
may also require a mordant to better the 
fastness of the dye on the material on 
which it is applied.
Page 3


DYES AND 
PESTICIDES
22.3.1.DISCUSS THE IMPORTANCE OF DYES 
AND PESTICIDES
EHTISHAM UL HAQ
IMPORTANCE OF DYES
• WHAT IS DYE:
Dyes can be said to be coloured, ionising
and aromatic organic compounds which 
shows an affinity towards the substrate to 
which it is being applied. It is generally 
applied in a solution that is aqueous. Dyes 
may also require a mordant to better the 
fastness of the dye on the material on 
which it is applied.
IMPORTANCE OF DYES
• WHAT IS PIGMENT
• PIGMENTS ARE GENERALLY COLOURED, ORGANIC OR 
INORGANIC SOLID POWDER, AND USUALLY ARE INSOLUBLE. 
THEY ARE NOT AFFECTED PHYSICALLY OR CHEMICALLY IN 
THE SUBSTRATE IN WHICH THEY ARE INCORPORATED. 
PIGMENTS CAN GIVE A FULL RANGE OF COLOURS. PIGMENTS 
HAVE A VARIETY OF APPLICATIONS THAT INCLUDES PLASTICS, 
INK, AND COATING APPLICATIONS.
•
Page 4


DYES AND 
PESTICIDES
22.3.1.DISCUSS THE IMPORTANCE OF DYES 
AND PESTICIDES
EHTISHAM UL HAQ
IMPORTANCE OF DYES
• WHAT IS DYE:
Dyes can be said to be coloured, ionising
and aromatic organic compounds which 
shows an affinity towards the substrate to 
which it is being applied. It is generally 
applied in a solution that is aqueous. Dyes 
may also require a mordant to better the 
fastness of the dye on the material on 
which it is applied.
IMPORTANCE OF DYES
• WHAT IS PIGMENT
• PIGMENTS ARE GENERALLY COLOURED, ORGANIC OR 
INORGANIC SOLID POWDER, AND USUALLY ARE INSOLUBLE. 
THEY ARE NOT AFFECTED PHYSICALLY OR CHEMICALLY IN 
THE SUBSTRATE IN WHICH THEY ARE INCORPORATED. 
PIGMENTS CAN GIVE A FULL RANGE OF COLOURS. PIGMENTS 
HAVE A VARIETY OF APPLICATIONS THAT INCLUDES PLASTICS, 
INK, AND COATING APPLICATIONS.
•
IMPORTANCE OF DYES
WHAT MAKES THE DYES COLOURED?
THIS IS A VERY COMMON QUESTION THAT OCCURS IN 
EVERYBODY'S MIND. THE ANSWER TO WHICH IS 
EXPLAINED BY THE PRESENCE OF A SUBSTANCE 
CALLEDCHROMOPHORE IN THE DYES
Page 5


DYES AND 
PESTICIDES
22.3.1.DISCUSS THE IMPORTANCE OF DYES 
AND PESTICIDES
EHTISHAM UL HAQ
IMPORTANCE OF DYES
• WHAT IS DYE:
Dyes can be said to be coloured, ionising
and aromatic organic compounds which 
shows an affinity towards the substrate to 
which it is being applied. It is generally 
applied in a solution that is aqueous. Dyes 
may also require a mordant to better the 
fastness of the dye on the material on 
which it is applied.
IMPORTANCE OF DYES
• WHAT IS PIGMENT
• PIGMENTS ARE GENERALLY COLOURED, ORGANIC OR 
INORGANIC SOLID POWDER, AND USUALLY ARE INSOLUBLE. 
THEY ARE NOT AFFECTED PHYSICALLY OR CHEMICALLY IN 
THE SUBSTRATE IN WHICH THEY ARE INCORPORATED. 
PIGMENTS CAN GIVE A FULL RANGE OF COLOURS. PIGMENTS 
HAVE A VARIETY OF APPLICATIONS THAT INCLUDES PLASTICS, 
INK, AND COATING APPLICATIONS.
•
IMPORTANCE OF DYES
WHAT MAKES THE DYES COLOURED?
THIS IS A VERY COMMON QUESTION THAT OCCURS IN 
EVERYBODY'S MIND. THE ANSWER TO WHICH IS 
EXPLAINED BY THE PRESENCE OF A SUBSTANCE 
CALLEDCHROMOPHORE IN THE DYES
IMPORTANCE OF DYES
• ALTHOUGH DYES INCLUDING TEXTILE DYES WERE DERIVED FROM NUMBER OF
VEGETABLE AND ANIMAL SOURCES, MODERN DYES ARE SYNTHETIC ORGANIC 
COLORANTS.
• UTILIZATION
• NEARLY EVERY INDUSTRY USES COLORANTS IN ONE WAY OR ANOTHER. ABOUT 
7,000 DIFFERENT DYES AND PIGMENTS EXIST AND NEW ONES ARE PATENTED 
EVERY YEAR. DYES ARE USED EXTENSIVELY IN THE TEXTILE (FABRIC USED IN 
CLOTHING) INDUSTRY AND PAPER INDUSTRY. LEATHER AND WOOD ARE COLORED 
WITH DYES. FOOD IS OFTEN COLORED WITH NATURAL DYES OR WITH SYNTHETIC 
DYES THAT HAVE BEEN APPROVED BY A FEDERAL AGENCY (PROVEN SAFE FOR 
HUMAN CONSUMPTION). PETROLEUM-BASED PRODUCTS SUCH AS WAXES, 
LUBRICATING OILS, POLISHES, AND GASOLINE ARE COLORED WITH DYES. DYES 
ARE ALSO USED TO STAIN BIOLOGICAL SAMPLES, FUR, AND HAIR. AND SPECIAL 
DYES ARE ADDED TO PHOTOGRAPHIC EMULSIONS FOR COLOR PHOTOGRAPHS. 
PLASTICS, RESINS, AND RUBBER PRODUCTS ARE USUALLY COLORED BY 
PIGMENTS.
•