The document discusses various color fastness tests for textiles, including:
1) Color fastness is affected by factors like washing, light, water, chlorine, and perspiration and is assessed using grey scales.
2) Grey scales contain pairs of neutrally colored chips used to visually assess color change and staining on a scale of 1-5.
3) Color fastness tests assess dye resistance to factors like rubbing, washing, light and perspiration through standardized testing procedures.
Acid wash is again becoming popular on denim jeans and we are going to see more of acid washes in the coming seasons. Here, let’s have a quick look at the acid washing process. An acid wash finish treatment creates significant contrasts in the color of the denim material. It can be done on Indigo & Sulphur base fabric garments. As the randomly faded, acid washed style came into vogue in 1980s, the process of treating denim in such a way began to become increasingly refined. Some tried to use a method similar to the stonewashing, yet the fading did not occur as dramatically or throughout the material. Acid-washed on apparel, (Phosphoric Acid is used in the process, acid would react with fabric surface and destroy the fabric), is washed with thermocol ball, pumic stones or until it is bleached almost white. During Acid wash, thermocol ball or pumic stones are used. By the action of thermocol ball or pumic stones, irregular fading affect is developed on the heavy garments like denims, thick canvas/twill, and sweater.
An experimental sample about tear strength testing of a fabric by Elmendorf's Tear Tester. This will helpful for the Textile Engineering student to know the measuring process of tear strength of a fabric.
Acid wash is again becoming popular on denim jeans and we are going to see more of acid washes in the coming seasons. Here, let’s have a quick look at the acid washing process. An acid wash finish treatment creates significant contrasts in the color of the denim material. It can be done on Indigo & Sulphur base fabric garments. As the randomly faded, acid washed style came into vogue in 1980s, the process of treating denim in such a way began to become increasingly refined. Some tried to use a method similar to the stonewashing, yet the fading did not occur as dramatically or throughout the material. Acid-washed on apparel, (Phosphoric Acid is used in the process, acid would react with fabric surface and destroy the fabric), is washed with thermocol ball, pumic stones or until it is bleached almost white. During Acid wash, thermocol ball or pumic stones are used. By the action of thermocol ball or pumic stones, irregular fading affect is developed on the heavy garments like denims, thick canvas/twill, and sweater.
An experimental sample about tear strength testing of a fabric by Elmendorf's Tear Tester. This will helpful for the Textile Engineering student to know the measuring process of tear strength of a fabric.
This presentation is my graduation internship presentation at BSL (LNJ group) Bhilwara (Rajasthan).
In this presentation I describe BSL company profile, Process significance, all steps which use for fibre to fabric in textile.
Lycra void, damage and precaution to avoid those in washingAzmir Latif Beg
There is a lot of factor are involve behind of lycra damage. By the following preventive monitoring in every step of our manufacturing process we can get improvement all over the standard level and will be able to overcome those kinds of unwanted issues.
(Over Dyeing) to dye for a second or third time with a different color. Over dyeing is such a rewarding way of rescuing an ugly or unsatisfactory colored cloth. It gives uneven look. sometimes over dyeing doesn’t mean all-time dyeing the garment which is previously dyed. Over dyeing may be normal dyeing or piece dyeing process.
This presentation is my graduation internship presentation at BSL (LNJ group) Bhilwara (Rajasthan).
In this presentation I describe BSL company profile, Process significance, all steps which use for fibre to fabric in textile.
Lycra void, damage and precaution to avoid those in washingAzmir Latif Beg
There is a lot of factor are involve behind of lycra damage. By the following preventive monitoring in every step of our manufacturing process we can get improvement all over the standard level and will be able to overcome those kinds of unwanted issues.
(Over Dyeing) to dye for a second or third time with a different color. Over dyeing is such a rewarding way of rescuing an ugly or unsatisfactory colored cloth. It gives uneven look. sometimes over dyeing doesn’t mean all-time dyeing the garment which is previously dyed. Over dyeing may be normal dyeing or piece dyeing process.
Color fastness is one of the important factors in case of buyers demand. The outstandingly important property of a dyed material is the fastness of the shade of color. Color fastness refers to the resistance of color to fade or bleed of a dyed or printed textile materials to various types of influences e.g. water, light, rubbing, washing, perspiration etc. to which they are normally exposed in textile manufacturing and in daily use. We have written a lot of articles on color fastness.
Evaluation of Wash and Light Fastness of Some Selected Printed FabricsIOSR Journals
Abstract: The printed fabrics were subjected to ISO2, ISO3, and ISO4 wash fastness test and assessed for
change in colour and staining using the grey scale. The change in colour of the tested specimen and the staining
of the adjacent undyed cloths were assessed with the appropriate grey scales. The fabrics were also tested for
light fastness property. The specimen and the blue standard were exposed behind a glass and inserted into the
light fastness testing machine. Exposure was carried out for 48 hours. Based on the research carried out, it was
found that the selected foreign fabrics show a higher wash and light fastness property as compared to the local
fabrics which also show high wash and light fastness property.
Lab dip is a process by which buyers supplied swatch is matched with the varying dyes percentage in the laboratory with or without help of “DATA COLOR”
Lab dip plays an important role in shade matching & and detaching the characteristics of the dyes and chemicals are to be used in the large scale of production. So this is an important task before bulk production.
Assessment of Bleached and Unbleached Jute Yarn with Various Dyes and Paramet...CrimsonpublishersMedical
This project deals with the studies on dyeing behavior of bleached and unbleached jute yarn dyed with different dyes as well as assessment of different quality parameters like as effect of different color fastness properties, Absorbency and Weight loss. In this research work Reactive dyes (orange), Acid dyes (red), Basic dyes (yellow) and direct dyes (blue) were used. Lab dyeing machine and other fastness machines (To analyze Color Fastness to wash and Colorfastness to rubbing) were used to conduct this research work. It was found that bleached yarn had higher depth of shade and better fastness properties under the same dye concentration. Among all the dyes reactive dyes showed the better fastness property.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
2. Color fastness of a dyed material: Color fastness, in normal sense, refers to the
resistance of color of a dyed or printed textile to various types of influences (e.g.
water, light rubbing etc.) to which they are normally exposed in textile
manufacturing and in practical sense. So we can say color fastness is the
resistance of the color to fade or bleed by some agencies like washing, light,
water, chlorine, perspiration, ironing etc.
Color fastness is usually assessed separately with respect to:
1. Changes in the color of the specimen being tested, that is color fading;
2. Staining of undyed material which is in contact with the specimen during
the test, that is bleeding of color.
3. Dyed or printed material may lose its color for the following:
• Due to decomposition of dye molecules in the fibre (as in light fading)
• Due to their removal (bleeding) into the external medium (as in
washing)
• Due to reaction with acid, alkali or perspiration(as in perspiration
fastness)
• Due to friction of outer surface (as in rubbing)
4. Grey scale:
Grey scale is an empirical scale containing a series of pairs of neutrally colored chips, showing increasing
contrast within pairs. It is used visually to assess contrasts between the pairs of patterns. For example, in order
to give numerical assessment of color changing and staining two sets of standard grey scales are used.
The ISO grey scales have two series of chips against which the change of color of a specimen and that of
staining of adjacent uncolored specimen can visually assessed and rated on a 1-5 scale.
Two sets of standard grey scales are used to assess color fastness.
One for assessing change in color
Other for staining.
5. 1. Color change grey scale: These scales consist of 5 pairs of grey colored materials rated from 1-5. Number-
5 has two identical greys, whereas number-1 shows the greatest contrast. Number-2, 3, and 4 have intermediate
contrasts. After appropriate treatment, the treated and original specimens are kept side by side and the change in
color of the treated specimen when compared to the original one is assessed and graded with reference to grey
scale. When there is no change in color of the test specimen it would be classified as ‘5’. If there is a change it is
then classified with the number of the scale that shows the same contrast as that between treated and original
specimens.
6. 2. Degree of staining grey scale: A different set of grey scale is used for measuring staining. Fastness
rating 5 shows by two identical white samples (that is no staining) and rating 1 shows a white and grey sample.
The other numbers show the geometrical steps of contrast between white and a series of grey. Here a piece of
untreated, undyed, unstained cloth is compared with the treated sample (if possible a multifibre fabric) which
was in contact with the test dyed specimen during the staining test. Finally this is compared with staining grey
scale and thus a grading i.e. numerical assessment of degree of staining is given.
7. Color Fastness Rating
Fastness grade Shade change of tested
sample
Fastness quality Staining of adjacent
white sample
5 No change Excellent No staining
4 Slight loss in depth Good Very slight staining
3 Appreciable loss Fair Moderate staining
2 Significant loss Poor Significant staining
1 Great loss in depth Very poor Deep staining
9. Color fastness to Wash
Principle of wash fastness:
1. A dyed material is laundered, rinsed and dried in contact with specified
adjacent fabric (MFF).
2. The special composite sample is treated under appropriate condition in a
chemical bath for a recommended time.
3. The abrasion action is accomplished by the use of liquor ratio and an
appropriate number of steel balls.
4. The change in color of dyed sample (specimen) and the staining of the adjacent
fabric (MFF) is assessed by recommended Grey scale.
10. Color fastness to Wash
Apparatus and Material needed:
• Wash wheel with a thermo statically controlled water bath rotating speed of 40 ±
2 rpm.
• Stainless steel container of capacity 55 ± 5 ml.
• Stainless steel ball of diameter 0.6 cm and weight 1 gm.
• SDC MFF (Acetate, Cotton, Nylon, Polyester, Acrylic, Wool)
• Thermometer
• Sewing machine
• Dryer
• Color matching cabinet
• ISO scales
11. Color fastness to Wash
Reagents:
• Reference detergent
• Sodium carbonate /soda ash
• Distilled water (Grade-3)
Sample Preparation:
A sample of dyed goods of size 10cm×4cm is cut and sew with same size MFF. This
is the composite test sample.
12. Test method Temp(0C) Time M:L Ratio Reagents Steel balls
ISO Recommendation
No.1 (ISO 105 C01)
40º ± 2ºC 30 min 1:50 Only soap (5 g/lit) 0
ISO Recommendation
No.2 (ISO 105 C02)
50º ± 2ºC 45 min 1:50 Only soap (5 g/lit) 0
ISO Recommendation
No.3 (ISO 105 C03)
60º ± 2ºC 30 min 1:50 Soap(5g/lit)+
Anhydrous Sodium
carbonate(2gm/L)
0
ISO Recommendation
No.4 (ISO 105 C04)
95º ± 2ºC 30 min 1:50 soap (5g/lit)+
Anhydrous Sodium
carbonate(2gm/L)
10
ISO Recommendation
No.5 (ISO 105 C05)
95º ± 2ºC 4 hours 1:50 soap (5g/lit)+
Anhydrous Sodium
carbonate(2gm/L)
10
13. Color Matching Cabinet
Evaluation: Compare the contrast between the treated and untreated sample with the Grey
Scale and staining of color in the adjacent multi-fiber fabric with the staining Grey Scale. This
assessment is done in a color matching cabinet.
14. Light Fastness
Light fastness is the resistance to fading of dyed textiles when exposed to daylight. Exposure to sunlight is a
test of the behavior of the sample under actual conditions of use but takes long time. ISO recommended
that, The sample should be tested together with standard dyed wool controls of light fastness 1-8
respectively.
Procedure:
In standard condition-
1. The sample and standards are mounted half covered and half exposed to daylight. The sample must be
protected from rain by a glass sheet not less than 5cm away (well ventilation due to moisture and
heat). The specimen and standards should be kept under sun and continue 24hrs until sufficient
fading. Reference sample and the tested sample are cut at same size and those are accommodated on
the template.
2. The specimens are mounted in a frame facing south in northern hemisphere and facing north in
southern hemisphere at an angle equal to the latitude of the place.
3. The way of carrying out the test is to mount the standards and specimens as-
15. Fastness rating Dye C.I. number
1 Acilan Brilliant +Blue
FFR
Acid Blue 109
2 Acilan Brilliant +Blue
FFB
Acid Blue 109
3 Coomassie Brilliant
+Blue R
Acid Blue 109
4 Supramine Blue EG Acid Blue 109
5 Solvay Blue RN Acid Blue 109
6 Alizarine Light Blue
4GL
Acid Blue 109
7 Soledon Blue 4BC
powder
Sol. Vat Blue 5
8 Indigozol Blue AGG Sol. Vat Blue 8
4. The sample must be protected from rain by glass sheet.
5. One quarter of the sample and standards are covered with opaque fabric. Thus it is exposed until standard-1 will be fade
and equivalent to standard-4 on change in color grey scale.
6. Then cover up one quarter of previously exposed portion of the sample and standards by another opaque sheet. Thus
it is exposed until standard-7 will be fade and equivalent to standard-4 on change in color grey scale
16. 7. Result will be terminated and opaque will be taken out, three stripes will be found in specimen and standards.
8. The zones of specimen are compared with zones of standards. The light fastness of a dyed sample is the number of the
wool standard that has faded to same extent as the exposed area of the sample.
Light fastness grades-
Grade Degree of fading Light fastness type
Grade-8 No fading Out standing
Grade-7 Very slight fading Excellent
Grade-6 Slight fading Very good
Grade-5 Moderate fading Good
Grade-4 Appreciable fading Moderate
Grade-3 Significant fading Fair
Grade-2 Extensive fading Poor
Grade-1 Very extensive fading Very poor
17. Rubbing fastness
Rubbing fastness is the resistance to fading of dyed textiles when rubbed against a rough surface. This test determines
the fastness of dyestuff to either wet or dry rubbing.
Procedure:
• Test specimen 15cm x 5cm (may be more, it has no effect) is placed on the base of the Crockmeter.
• Square of white test cloth (5cm x 5cm) of cotton desized, bleached but without finish (as ready to dye)
• Specimen is attached to the finger of the crockmeter.
• This finger is used in rubbing action on the sample specimen i.e. rubbing 10cm long to and for 10 times at
10seconds.
• 20 rubs in 10s and finger pressure on the specimen is 9N.
• For testing dry and wet rubbing, separate sample is used.
• Rubbing test is both for warp way and weft way.
• For wet rubbing, sample is dry but standard cloth is wet.
• Change in color in the specimen and staining in the white cloth is determined by grey scale.
In both cases, for both dry and wet rub test, the fastness to rubbing is rated 1-5.
Rating 1 means the worst rubbing fastness.
Rating 5 means the best rubbing fastness.
20. Perspiration Fastness
The garments which come into contact with the body where perspiration is heavy (like neck, under
arm etc) may suffer from serious local discoloration. Fastness to perspiration is the resistance to
color of textile against the discoloration effect of acidic or alkaline perspiration.
Two artificial perspiration solutions are made as follows-
Chemicals Solution A Solution B
l-histadine monohydrochloride
mono-hydrate (C6H9O2N3HCl.H2O)
0.5gm 0.5gm
Sodium chloride 5.0gm 5.0gm
Di-sodium hydrogen orthophosphate
(Na2HPO4.2H2O)
2.5gm 2.2gm
Distilled water 1000ml 1000ml
PH (adjust with NaOH) 8 5.8
22. Procedure:
1. Sample size (10cm x 4cm) is taken.
2. The sample (10cm x 4cm) is placed between two undyed fabric pieces (5cm x 4cm).
3. One of the two pieces of undyed sample, if available, one should be a multifibre fabric. This fabric has
different fibres side by side. One of the compositions from multi-fibres should be considered as the same
fabric of the tested sample and other would be indicated as below-
If the first piece is The second piece will be
Cotton Wool
Wool Cotton
Silk Wool
Linen Wool
Viscose Wool
Cellulose Acetate Viscose
Polyamide Wool or viscose
Polyester Wool or cotton
Acrylic Wool or cotton
23.
24.
25. Question
• Which factors affect the fastness properties of colored textile
materials? [3]
• How to assess colored textile with grey scale? [2]
• Explain the testing procedure of color fastness to rubbing. [5.5]
• Explain the testing procedure of color fastness to wash. [5.5]