Nippon Kayaku (Thailand) CO., LTD.
Technical Service Center[Additional light fastness results of KP 5L-SF 200 and KM 6L-SF]
Please see the following documents for reference:
1) Introduction of KP 5L-SF 200 and KM 6L-SF series
2) KP 5L-SF 200 and KM 6L-SF technical information
In addition to the above documents, we have conducted additional light fastness tests in comparison on different
materials, which will be the focus of this document.
Additional fabric materials wherein light fastness tests were conducted:(A) Front 1d Brushed Polyester /Back 3d Polyester(B) Polyester blackout curtain material(Material in which carbon yarn is woven in the middle of the front and back)(C) Ultra-fine polyester fiber

NIPPON KAYAKU (THAILAND) CO., LTD.
ADD: 13th Floor, Ramaland Building, 952 Rama IV road, Suriyawongse, Bangrak, Bangkok 10500
TEL: +66-2-235-2843 HP: http://www.kayakuth.co.th

(A) Front 1d Brushed Polyester /Back 3d Polyester

Other company SE type
trichromatic colors A

Other company SE type
trichromatic colors B(B) Polyester blackout curtain material (carbon-doped yarn is woven between the front and back)Other company SE type
trichromatic colors A

Other company SE type
trichromatic colors B

NIPPON KAYAKU (THAILAND) CO., LTD.
ADD: 13th Floor, Ramaland Building, 952 Rama IV road, Suriyawongse, Bangrak, Bangkok 10500
TEL: +66-2-235-2843 HP: http://www.kayakuth.co.th(c) Ultrafine fiber Polyester

Other company SE type
trichromatic colors A

Other company SE type
trichromatic colors B

NIPPON KAYAKU (THAILAND) CO., LTD.
ADD: 13th Floor, Ramaland Building, 952 Rama IV road, Suriyawongse, Bangrak, Bangkok 10500
TEL: +66-2-235-2843 HP: http://www.kayakuth.co.thSummary of light fastness results shown above
Carbon-arc (JIS)
Front 1d Brushed Polyester

PET Blackout curtain

Back 3d Polyester
Trichromatic%owf

KP Yellow 5L-SF 200
KP Red 5L-SF 200
KP Blue 5L-SF 200
KM Yellow 6L-SF
KM Red 6L-SF
KM Blue 6L-SF
KP Yellow Brown 3RL(EC) 143
KYC Red E-GL
KYC Blue E-TB
Disperse Orange
KM Red C-LS(EC) conc
KP Blue AN-SEKM Yellow AQ-LE
KM Red AQ-LE
KM Blue AQ-LE
C.I. Disperse Orange 30
C.I. Disperse Red 167.1
C.I. Disperse Blue 79.1

0.107
0.052
0.170
0.145
0.1040.246
0.145
0.060
0.228
0.190
0.054
0.148
0.245
0.337
0.388
0.116
0.032
0.149
0.171
0.094
0.335
0.105
0.202
0.401

Other company SE type
trichromatic colors A
Other company SE type
trichromatic colors B

Ultrafine PET

Grade 4

Grade 5

Grade 6

Grade 4

Grade 5

Grade 6

Grade 4

Grade 5

Grade 6

4↑
4-5

5↑
4-5

5-6
4-5

4↑
4-5

5↑
4-5

5-6
4

4
4

3-4

2-3

4↑
4-5

5↑
4-5

6↑
4-5

4↑
4-5

5↑
4-5

6↑
4-5

4↑
4-5

4-5
4

3-4

4
4-5

3-4

2-3

4
4

2-3

24↓2-3

1-2

1-2

4
4-5

3-4

2-3

44

2-3

24↓
3-4

2

1-2

44

3-4

2-3

44

324↓
3-4

1-2

1-2

4↓
3-4

31-24↓
32

1-2

4↓
2

114↑
4-5

4-5
4

2-3

4
4

2-3

24↓
32

1-2

4
4-5

4

2-3

4
3-4

2-324↓
32

1-2

Judgement:

Upper (Blue): Blue scale

Lower (Black): Grey scale

・ In the results of the light fastness tests, the numbers in blue represent the blue scale results, while thenumbers in black represent the grey scale results. If the judgement by blue scale is concluded as 4↓ at
Grade 4, Grade 5 irradiation is not further conducted and will be judged as 4↓.
・ When conducting Grade 4, Grade 5, and Grade 6 irradiation in series, grey scale fading judgement may
provide more clarity in interpreting the results.
・ In fact, there is an increasing number of apparel standards overseas that require ISO or AATCC irradiationof X hours and a gray scale of 3-4 grade or higher for fading. The price of blue scale is high, and the dyes
used for blue scale are different between JIS, ISO, and AATCC standards, so even if each blue scale isirradiated at the same time, the result will be different depending on the standards. Also, as you may haveexperienced, if the inspection agency implements light fastness, the blue scale that is simultaneously
irradiated will not be returned unless requested. Thus, the result may not be verifiable.
・ KP 5L-SF 200 and KM 6L-SF are recommended when there are requirements for high light fastness (5 thGrade or higher). For some micro-polyester materials with poor light fastness, the light fastness may beimproved by using an ultraviolet absorber. However, if the fastness is still not sufficient to pass thestandard, we would like to recommend testing our KP 5L-SF 200 and KM 6L-SF as a solution.
・ As a side note, sales of KM 6L-SF has been increasing recently as the number of materials or standards that
require light fastness has been expanding overseas.

NIPPON KAYAKU (THAILAND) CO., LTD.
ADD: 13th Floor, Ramaland Building, 952 Rama IV road, Suriyawongse, Bangrak, Bangkok 10500
TEL: +66-2-235-2843 HP: http://www.kayakuth.co.th