Namoh Overseas is a professionally managed company with a proven track record, with the main objective of manufacturing and exporting various types of Basic Dyes.
Leading manufacturer and exporter of Basic Dyes from India
Principales fabricantes y exportadores de tintes basicos de la India
Fhrende Hersteller und Exporteur von basischen Farbstoffen aus Indien
Fabricant et exportateur des colorants basiques de l"Inde
Our Basic Dyes have application in Paper Industry
Basic Dyes for Ink
Basic Dyes for Paper
Basic Dyes for Agrochemicals
Basic Dyes for Textile(acrylic fibers)
- The outstanding characteristics of the basic are brilliance and
intensity of their colors.
- The bright colors achieved from basic dyes do not usually occur with
other dye classes.
- Many of the basic dyes are sparingly soluble in water.
- The addition of glacial acetic acid helps to dissolve the basic dye
quickly in water.
- Basic dyes are readily soluble in alcohol or mentholated spirit.
- The basic dyes are poor fastness to light and vary with regard to
washing fastness from poor to moderate.
- An important property of basic dyes is that they will combine with
tannic acid to form an insoluble compound provided mineral acid is
absent.
- The wet fastness of the basic dyes on protein fibres can also be
improved by back tanning. This consists of after treating the dyed
material with tannic acid in order to form the insoluble complex thereby
reducing the tendency to migrate.
- The basic dyestuff will combine with direct or sulphur or some acid
dyestuffs. So they cannot be used together in the same bath. But basic
dyestuffs are used in after treating cotton or other materials dyed with
direct colors. Here the direct dyestuff acts as mordant.
- When treated with a reducing agent most of the basic dyes get
converted into their colors less leuco compounds, return to their
original color by oxidizing agents or even by exposure to air.
- Basic dyes can be removed from the material by boiling it with dilute
acetic acid or hydrochloric acid.
- Basic dyes are used for woolen goods when particularly bright shades
are required which cannot be obtained with an acid dyes.
- Basic dyes do not have affinity for cellulosic fibres like cotton.
The use of basic dyes on cotton involves the troublesome process of
mandating with tannic acid. But, sometimes, bright shades are demanded
on cotton which can only be obtained with them.
- Special cationic dyes are available for dyeing acrylic fibers.
- Basic dyes are also used for making inks, typewriter ribbons and
dyeing leather