TRADE NAME

BLUE OCEAN

BOTANICAL NAME

INDIGOFERA TINCTORIA

PROPERTIES

•

The leaves of Indigofera tinctoria plant are fermented in fermentation pits. The dye is precipitated by oxidation or by passing the air. The precipitated blue natural dye at bottom is dried in the air to make the cake.

•

This is a vat dye and is used after converted into liquid form with sodium hydrosulphite and caustic soda in soft water. The dyeing is carried out in the reduced liquid form at about 25oC to 30oC. By oxidation, the dyed fabric slowly changes into blue colour form green.

•

The process of dyeing of cotton, wool and silk is almost same.

•

The appearance of dye is blue and main colouring compound is Indigotin.

BOTANICAL NAME

Indigofera tinctoria

COMMON NAME

Indigo Blue

PART USED

Leaves

MAIN COLOURING COMPONENT

Indigotin

CHEMICAL FORMULA

STRUCTURE

TYPE OF DYE

Vat Dye

C.I. NUMBER

C I Vat Blue 1

DESCRIPTION

It is prepared from leaves pf plant Indigo Tintoria by natural fermentation process.

APPEARANCE

Blue

SOLUBILITY IN WATER

4.0 ± 2.0 %

pH OF 1% sOLUTION

5 ± 1

MOISTURE CONTENT

5.0 ± 1.0%

TOTAL ASH CONTENT

63.0 ± 7.0 %

ACID INSOLUBLE ASH

35.0 ± 2.0 %

BULK DENSITY (gm/cc)

0.80 - 0.90

COLOUR IMPARTED

Blue