Questions about color fastness to perspiration

Contents

1 What are the types of fastness?

2 What is perspiration fastness?

3 What is
perspiration fastness?

3.1 Perspiration fastness of YG631 series color fastness
tester

3 .2 Y902 Oven for Sweat Color Fastness Test

4 What is a textile sweat
test?

5 How do I use a perspirometer?

6 How can I improve my color fastness to
perspiration?

What types of fastness are there?Colour fastness refers to on the resistance
of the textile dye to various influences during processing and use. The color
fastness test of textiles is a routine point in the actual quality test of
textiles. In general, the degree of color fastness is evaluated by the
distortion of textiles, the sample and the stain of the undyed lining fabric.
Color fastness is an important test point for the quality of textile and
clothing products. According to the different application environment of Textil
and apparel fabrics in the actual production and application process, the CoAn
the authenticity of textile and apparel fabrics are subject to different
requirements.

With the improvement in people\'s living standards, textiles and apparel
should not only meet people\'s needs protection against heat, but also meet
people\'s needs for functionality and individuality. Colorful and colorful
textile clothing, to meet people\'s needs for individuality, but also to meet
people\'s special needs for beauty. Although the changing color of clothes
increases the variety of clothing styles to some extent, it also brings certain
difficulties in the quality control of clothing products. How to reduce the dye
in storage, washing, maintenance of color waste, fading and other conditions,
clothing production u need to adaptcompany face the quality problem. In order to
standardize the quality of textile and clothing products produced and sold,
national standards have set clear requirements for the color fastness of
textiles and clothing.

There are dozens of color fastness claims. Common color fastness includes
color fastness to rubbing, soap, sweat stain, water, saliva, light, light and
sweat, etc., which are mainly selected and evaluated according to the use of the
final product. Among these are: color fastness to dry rubbing, color fastness to
water, color fastness to sweat stains and color fastness to saliva (for baby
products only) are the requirements of the Basic Safety Specifications for
textiles.

What is perspiration fastness?

On human skin there are Millions of
active sweat glands. The forehead, the armpits, the front chest, the back and
the handsurfaces sweat more. Therefore, in these parts of the skin, summer
clothes such as shirts, T-shirts and other clothes are often used Serious fading
phenomenon.

As we all know, the composition of human sweat is complex, with the main
component being salt, which differs from person to person. Sweat has both acid
and alkali. Brief contact between textiles and perspiration may have little
effect on color fastness, but long time close to the skin and perspiration
contact will have a greater impact on some dyes. Clothing with full dye fastness
can easily transfer dyes from textiles to human skin through perspiration, and
dye molecules and heavy metal ions can be absorbed by the human body through the
skin and cause harm to health.

Color fastness to perspiration refers to the degree of color change caused by
soaking the farBig fabric in acidic or alkaline solution and a certain
fibrousness is caused time and then treated under certain conditions, and the
degree of color stain caused by a variety of fibrous cloth.

What is a sweat tester? YG631 Series Sweat Color Fastness Tester

Perspiration Color Fastness Test Kit

Application:

YG631 Series Sweat Color Fastness Tester is used to determine the color
fastness to water, sweat, saliva and seawater of textiles .

Features:

Specially designed weight sets meet various requirements of ISO and/or AATCC
standards; Microcomputer with PID parameters control function, avoid
over-temperature; Advanced jet system design, low temperature fluctuationn,
stable temperature uniformity; Control of heating by contactless solid state
relay, no noise, long service life; Oven temperature and time are preset.
adjustable with properly displayed temperature; digital timer with audible alarm
when preset time is up; the working chamber is made of mirror-like 304 stainless
steel plate, effectively preventing acid and alkali corrosion; with two layers
of stainless steel shelf, each layer can place two test frames, there are
maximum four test frames for each test, which will surely save energy and
improve work efficiency; the door features a large double observation window
made of tempered glass.

Related standards:

ISO105 E01, E02, E04, AATCC15, 106, 107, 165, GB/T 3922, 5713, 5714, JIS
L0846, L0847, L0848 etc.

Parameters:

Model No.YG631Weight Set 5kgResin Plate
BottleArea60×115mmDimensions210×100×160mm (L×W×H)Net Weight 12kgY902 Weld Color
Fastness Test Furnace

Y902 Weld Colorfastness Oven

Application:

The Y902 Weld Colorfastness Oven used together with YG631 series sweat color
fastness tester to perform color fastness sweat test.

Parameters:

Temperature rangeRT~99oC, LED displayTemperature accuracy±1oCTime range0~99h/
99min/99sCapacity28LWorking chamber dimensions340×260×320mmPower supplyAC220V
50HzWhat is a sweat test in textile?

The textile sample is combined with the specified lining material and placed
in two different test liquids containing histidine. After separate treatment,
the test liquid is removed and placed in the test device betweengiven two plates
with the specified pressure. Then the sample and the lining are dried
separately.

The discoloration of the sample and the stain on the lining were evaluated
using a gray sample card. As we all know, human sweat composition is complex,
the main component is salt, which differs from person to person. Sweat has both
acid and alkali. Brief contact between fabric and perspiration may have little
effect on color fastness, but long-term close contact with skin and perspiration
will have a greater impact on some dyes. Clothing with full dye fastness can
easily transfer dyes from textiles to human skin through perspiration, and dye
molecules and heavy metal ions can be absorbed by the human body through the
skin, causing harm to health.

For consumer health, national obligations requireorm GB 18401-2010 “National
technical specification for the basic safety of textile products” that the
classification of Class A products (textile products for young children) with
color fastness to perspiration stains (acid and alkali) should be greater than
or equal to 3–4. The requirements for class B products (products that come into
direct contact with the skin) and class C products (products that do not come
into direct contact with the skin) are higher than or equal to level 3 (the
color fastness of sweat is divided into 1 to 5, the larger the value, the better
the color fastness).

The color fastness of sweat is intended to reflect the distortion of the
color of the textile and the staining of the lining in various test liquids
containing histidine under the combined effects of pressure and temperature . A
gray card was used to assess sample distortion and lining fabric stains. The
results were divided into 5 grades, 5 grades good und 1 grade bad.

How to use a perspirometer?

First place the composite sample between the plastic plates and then between
the base frame and the spring pressure frame. Insert the hammer After the spring
pressure plate test standard was required, finally the seat bolt was tightened
and everything was placed in the constant temperature oven (Oven for color
fastness to perspiration).

The specific operations refer to the Test standards ISO 105-E01/E02/E04-1994,
AATCC 15/106/107-2002, etc.

How can I improve my color fastness to perspiration?

The main way to improve the color fastness to perspiration of fabrics is
through is to choose dyes judiciously, especially dyes with high color fixation
rate and good stability. Through appropriate formulation and control of the
dyeing process, strengthening dye fixation conditions and forming stable
covalent bonds, dyes canbe fully fixed. For example, when the reactivity is
poor, the catalyst can be selected, or the appropriate color fixing agent c can
be chosen, or the color fixing can be taken over at a higher temperature.

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