Science of Denim

Denim is defined as being traditionally a 3/1 warp-faced twill fabric made from yarn-dyed warp and undyed weft yarn. Among all types of fabrics  no other fabric has received such a wide acceptance like as denim. It has been used extensively by people of all ages, classes and genders. Denim can be considered as the most widely used garment in the apparel business. It is well known that denim and jeans have had a major influence on the lives of consumers since their inception. Denim processing or washing is an important operation for value addition of the final products in the apparel business. There are numerous operations exist for fulfilling of this treatment. In this article I will discuss about environment friendly denim processing or finishing technologies with briefly. Generally four types of technologies are used in sustainable denim processing. They are described below. Sandblast finishing of denim: We know that, to achieve a special look as well change the fashion, requisite w

Introduction: Bangladesh export industries for apparel and textiles have completed its four decade. During this time there were different phases of challenges and prosperity. In the 1 st  decade the challenge was the technical know-how. Some of the big enterprises of that time played a leading role e.g. Reaz garments, Desh Garments, Paris Garments, etc. Of them Desh garments together with Korean company Hyundai trained many of its staffs in Korea for technical training. From those trained staffs our industry got many new entrepreneurs who later become leading industrialist of this time. At the middle of its 2 nd  phase the government took various steps in order to set up backward and forward linkages for the industry. This brought many new spinning mills, weaving mills, and most importantly knitted composite factories were grew up in the country like mushrooms. During the end of 2 nd  decade and start of the 3 rd  decade Bangladesh garment industry faced the first global challen

What is Formaldehyde? Formaldehyde is a volatile  organic compound , it is present in nature in small quantities,  human blood  and apples both have traces of Formaldehyde. Why is it restricted? In larger quantities, Formaldehyde can cause respiratory problems and skin irritation. How does it get into the product? In textiles formaldehyde is used in anti shrinking treatments and in resin finishes to impart aesthetic properties to textiles such as crease resistance. What are the Legal   Requirements ? Finland was the first  European country  to apply limiting values to Formaldehyde in 1988, there are now many European  countries  that have  regulations  in place, including, Germany,  Norway  and Holland. There is no UK legislation at the moment, however most UK Retailers have set their own limits in line with, or more severe than European Regulations. Formaldehyde is currently under consideration for inclusion within REACH. Test Methods Free Formaldehyde

Now a day’s Denim is a most popular and demanding fabric around the world because of the unique features of denim fabric. Denim came from the French word “Serge de Nimes”. “Jeans” produced by denim is preferable to the teenagers because it can be worn as a fashionable or casual dress in different conditions. The production of denim is more than 50 percent of the world’s production is done by the South Asian countries whereas China and Bangladesh are one of the larger contributors. The following features of denim fabric can be identified: 1. Denim is one of the highly demanding international commercial fabric 2. Produce by 100% cotton yarn but you may find there are a few denim fabric blended with spandex and polyester. Manufactured by Twill weave 3. Warp yarn dyed by indigo/blue eye 4. Weft yarn remain white/grey as its natural color 5. Denim jeans is very strong and does not tear easily that’s why it is long lasting. 6. Denim can be ironed at a high temperature 7. Denim is

Desizing Desizing is the first chemical process in the wet process. Desizing is the term usually restricted to the process of removal of starch (of the size) from the cloth. De-sizing processes can be controlled by desizing process can be controlled by desizing liquor shorter time process. There are several methods for desizing and these can be classified as follows- Objectives of Desizing From the definition of desizing you know that it is a chemical process in wet processing. For this importance, there are several objectives of desizing that can be identified. These are: 1. To remove starch from fabric desizing is done. 2. To improve the absorbing capacity of the fabric. 3. To make ready for the next process scouring, bleaching, etc. 4. To improve absorbing attain of chemicals. 5. Increase the luster of dyeing and printing. #Collected 

What is enzymatic desizing and what is the recommendation for efficient enzyme desizing? Desizing is the process of removing the size material from the warp yarns after the textile fabric is woven. Enzymatic desizing is a traditional desizing procedure of degrading starch size on cotton fabrics using enzymes. Enzymes are multipart organic, soluble bio-catalysts, created by living organisms that catalyze chemical effect in a biological process. Enzymes are quite specific in their act on a particular material. A small amount of enzyme is able to decompose a large quantity of the material. -Before enzyme de sizing cloth should be wetted with warm water. -Enzyme activity should be tested before use. -pH should be controlled. -Avoid copper made machines. -Enzyme treated cloth keep in a rider room. -Treated cloth wash with hot water. -Should be careful that enzyme above 70 degrees the centigrade temperature will be inactivated or damage. How Enzyme activity Depends on Concentrat

The best practice is a manufacturing methodology or technique which is developed by longtime research and accepted as the best method to do a particular job. Here I am giving best practice followed by Garments washing factory, you may set them as a standard operating procedure (SOP) for the whole washing process. Hope this article would help you enrich your knowledge of best practices of Garments Washing Factory. Pre-Production /Sample Development Stage of Garments Washing Factory: 1. Set a detailed SOP for sample development and pre-production procedure and team organogram for proceedings, make visible for all. 2. Your factory should have a separate department or a team (R&D) for handling samples development and duplication. 3. Development samples, and then duplicated samples are kept with records/recipe for future follow up. 4. Development team reviews the PDM & check requirements before start shade band/the first batch. 5. Developments samples are scan and reviewed