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Pre-Treatment
This is a primary process where all fabrics are prepared for printing. In this process fabrics are coated with chemicals (like urea, alginate etc.) and prepared for the process of digital printing.
Printing
Here the fabric is printed by digital printers with the designs prepared on computer.
Post-Treatment
• Here the fabrics is steamed at high temperature so the colours are fixed on to the fabrics, this is also known as ageing of fabrics.
• Then fabrics are washed and dried.
WORK PROCESS
The processing of Fabric is generally classified into 2 types -
Pre Process and Post Process
The Preprocess includes following stages -
• RFD
• Printing &
• Padding
Each of the process can be explained in detail as under -
RFD
If the fabric received is grey, then we will have to do RFD i.e make it ready for Dying. It is genrally done in mills or process houses.
Padding
This is the second process after RFD. Its called guming also.its basically a chemical coating on the fabric whithout this if we print on the fab the fab will again become white again after post printing process. So it very important that fab is padded before
Printing
After padding process we can start printing directly on the fabric. For digital printing we require minimum 300 dpi file in tiff. Format. In Digital Textile Printing, genrally two types of printing inks are used namely Reactive and Disperse.
Reactive is very common and regular printing because it is genrally used for printing fabrics like cotton, silk, cifon, geoget, voile etc. Maximum printing is done using reactive inks.
Dispersed inks are generally used for polyester, nylon or nilopolis or cottonpoly type of fabric and it requires more steaming temperature than reactive print. Other post process are same as reactive.
POST PROCESS
Steaming or Azer / Ager
This is the second processes done after printing. In this the fabric needs to be kept in side steamer or azer for atleast 15 to 25 mins at temperature of 110 to 115 degree for colour fixation.
Washing
After the colour fixation process there is the special way of washing the fabric to ensure that the colour fastness stays, it is generally very long lasting. During this process, First the Fabric is washed in cold water than with Hot water and then again added with cold water soap. This process ensures that the fabric can now on be washed for ever without the slightest doubt of its able to lose its colour or the fastness.
Finishing
Finishing process is the last of the processes which is done to achieve the better feel of the fabric. It is done according to the taste of the buyer. Buyers generally recommend fabric samples for the finish.
Finishing includes further three processes as follows:
Silicon Wash: It is just to give smooth and soft feel to the fabric. It is usually done on stenter in almost the similar way coating is done.
Zero Zero or 00: It is the machine name of the finish. It allows it to break the stiffness of the thread and give more fall in the fabric. This finish is mostly required for voile fabric.
Calender: This process is required only for home furnishing clients, It is generally done for silk and cotton satin. Calender process adds shine to the fabric.
