Indigo dyeing is usually done in yarn that is then woven to produce Denim with a characteristic worn faded look.
The problems of dyeing indigo are mainly related to the pollution of the process, due to the reduction agents and caustic soda discarded into the effluent and working conditions due to indigo powder in the air, released during the oxidation process.
H2COLOR-Denim is applied to any form of textiles and is specially useful for dyeing Denim by exhaustion dyeing, otherwise not possible to dye with standard indigo dye.
Dyeing with H2COLOR-Denim is a simple short process that does not need reduction nor oxidation. The dye is in the form of a liquid dispersion of H2COLOR-Pigment which is fixed in an exhaustion process, using a proprietary fixing agent. It is a simpler process and level colours are obtained on fabric or garment dyeing.
Other colours of H2COLOR-Pigments can be obtained on request. These are hybrid pigments, based on a novel dye-particle compound that has both the properties of dyes, such as higher range of colours and affinity for cellulosic fibres, and are solid partilcles, like pigments. Temperature of application can be as low as 25ºC, saving energy. The worn look is obtained in a follow up process, with abrasion or enzymes.
When laundering for the washed down effect on garments, indigo is very polluting. Bleaching is usually done with hypochorite to bring down the colour from dark dyed indigo jeans. With the H2COLOR process, the process is a lot less polluting not needing bleaching but only friction, since light colours are obtained directly when dyeing garments.