Sunscreen® Natté 4503 - CMS

® 

Sunscreen range 

Sunscreen 

Natté4503 

® 

Fire retardant coated 

fibreglass yarns fabrics 

Solar protection: 

All types of blinds 

Tensile structures: 

All types of shapes and volumes 

external and 

internal 

printable 

Width 250 cm 

> 

www.sunscreen-mermet.com 

Properties

Sunscreen Natté4503 

® 

Productfeatures 

> New 

Tightly woven basket weave 

fabric – openness factor 3% - 

in 30 colours 

> 

Excellent heat protection: 

up to 97% of solar radiation 

reflected with external blinds 

> 

Very good mechanical 

resistance, height/width 

reversible for stretching skylight 

blinds or tensile structures 

> 

97 % of the light rays filtered: 

excellent glare control 

> 

Printable, communication 

medium 

modulight® 

intelligent fabrics

SunscreenT-Screen9601 


® 

> www.sunscreen-mermet.com

Projection 

shades 

Garden shades Roller blinds Velums Roof light Roman shades Decorative 

blinds 

panels 

Skylight 

blinds 

External blinds External and internal blinds Internal blinds 

® 


Pinpoint the performance 

factors 

Level of incoming natural light 

No light Low Optimized light Strong 

light 

light 

NL 1 10 23 40 

Glare control 

None Low Medium Good Excellent 

EC 1 14 28 40 

Protection against the heat gain from sunlight 

None Low Good Very good 

HP 1 10 26 40 


HP 1 36 40 

internal 

external 

Quality of outward visibility 


CV 1 12 17 40 

4 comfort factors 

to choose the right 

fabric for the function 

No light 

Low light 

Optimized light 

Strong light 

NL 

Level of incoming natural light 

To obtain the best out of natural lighting, 

select in the 12 to 30 factor range. 

To block out the light completely, 

select from the 1 to 5 range. 

and colour required 

and ensure the 

success of your solar 

None 

Low 

Medium 

Good 

Excellent 

EC 

Glare control 

For adequate glare control, 

do not select below factor 22. 

protection. 

None 

Low 

Good 

Very good 

HP 

Protection against 

the heat gain from sunlight 

To be protected from the heat, 

select in the 20 to 40 factor range. 

The Modulight ® Rapid’ Selection 

system, including the 4 comfort 

factors and their scale of values, 

is the property of Mermet S.A. 

It refers solely to solar protection 

fabric in the Mermet Modulight ® 

collection. Any whole or partial 

reproduction is forbidden. 


CV 

Quality of outward visibility 

To make the most of visibility and provide true 

transparency, start at factor 15. To ensure 

privacy, select a factor lower than 5 .

Flat structures 

Shaped 

structures 

Volume 

structures 


® 

Tensile structures 

ThemostefficientModulight ® fabric 

fortensilestructures 

Sunscreen ® Natté 4503, 

a new product for everything you dare in solar protection and tensile structures. 

>Cost-saving thermal comfort: 

Sunscreen ® Natté 4503 performs 

outstandingly when used for 

external blinds. The fabric stops 

the sun's rays before they hit 

the glazing, and prevents the 

greenhouse effect inside. The 

tighter weave reflects up to 97% 

of solar radiation and gives 

effective protection from heat. 

This performance is also due to 

its open basket weave pattern 

which provides better ventilation 

and helps to prevent heat accumulating 

between the glazing and the 

blind. Advantages: energy saving 

and lower greenhouse gas emissions. 

>Excellent glare control: 

Sunscreen ® Natté 4503 filters up 

to 97% of the light rays (min. 

Tv – 3%). This glare control 

ensures visual comfort at all 

times of the day and stops 

disturbing on-screen reflections. 

Moreover, the fabric also rejects 

out up to 97% of the UV rays, the 

cause of the discolouring effect 

of sunlight. 

>Excellent mechanical resistance: 

thanks to its fibreglass 

composition and its woven 

basket weave pattern, Sunscreen ® 

Natté 4503 has an excellent 

mechanical resistance. This 

means it can be used for skylight 

blinds and other tensile structures 

and makes it height/width reversible, 

so it adapts to the size of your 

panels with a minimum of seams. 

Sunscreen ® Natté 4503 fits with 

all your projects. 

>Optimal transparency and an 

element of decoration: the 

secret of transparency lies in the 

uniform coating of the yarn and 

the regularity of the weave, which 

offer a very clear view to the 

outside. So good for well-being, 

transparency is greatest with dark 

colours. Sunscreen ® Natté 4503 

is available in 30 colours to 

match all environments. 

>Strength and peace of mind 

guaranteed: made of coated 

fibreglass yarns, Sunscreen ® Natté 

4503 has perfect dimensional 

stability in panels of all sizes. It is 

unaffected by the heat, cold and 

bad weather. Rot-proof and labeled 

Oekotex Standard 100, it 

contains no chemicals harmful for 

the health and safety of users. 

It is non-flammable and easy to 

maintain. 

>Communication medium: 

Sunscreen ® Natté 4503 is 

printable: it offers perfect legibility 

and enhances colours whatever 

printing process is used. 


Width 250 cm 98.4” 

Natural 

light 

Eye 

comfort 

Heat 

protection 

Contrast 

vision 

internal external 

3030 Charcoal 0130 Grey Charcoal 3001 Charcoal Grey 

10 28 10 40 17 10 28 10 40 17 10 28 10 40 17 

0140 Grey Marine 0101 Grey 0701 Pearl Grey 

11 27 14 39 16 10 28 12 40 17 13 25 16 39 14 

0740 Pearl Marine 0102 Grey White 0201 White Grey 

11 27 15 39 15 15 24 18 38 14 15 24 18 38 14 

0103 Grey Turquoise 0109 Grey Mandarin 0707 Pearl 

11 27 15 39 15 11 27 15 39 15 16 22 17 37 14 

0150 Grey Green 0108 Grey Orange 0205 White Canary 

11 27 14 39 16 11 27 16 39 15 23 14 24 36 12 

NL = Level of incoming natural light, EC = Glare control, HP = Protection against the heat gain from sunlight, CV = Quality of outward visibility.


® 

3006 Charcoal Bronze 1006 Sable Bronze 0710 Pearl Sable 

10 28 10 40 17 10 28 11 40 17 16 22 17 37 14 

1001 Sable Grey 0110 Grey Sable 0720 Pearl Linen 

11 27 14 39 16 11 27 14 39 16 17 21 20 37 13 

1010 Sable 1002 Sable White 0210 White Sable 

16 24 18 37 14 17 21 20 37 13 17 21 20 37 13 

2020 Linen 2002 Linen White 0220 White Linen 

20 17 24 36 12 21 17 24 36 12 21 17 24 36 12 

0702 Pearl White 0207 White Pearl 0202 White 

18 20 23 37 12 18 20 23 37 12 23 14 26 36 12 

Colours in the prints may be slightly different from the actual ones. 


The technical data at a glance 

Composition 

42 % Fibreglass 

58 % PVC 

Fire classification M1 (F) NFP 92 503 

B1 (DE) DIN 4102-1 

BS (GB) 476 part 6 and 7 Class 0 

FR (USA) 

NFPA 701 – 89 Small 

NFPA 701 – 89 Large 

NFPA 701 – 99 TM # 1 

California US Title 19 

AS (AUS) AWTA Tested AS 1530 

part 2 and 3 

B1 (CN) GB 50222-95 

Openness factor 3% 

UV screen Up to 97 % 

Width 

250 cm 

98.4” 

Pattern Basket weave 2 x 2 

Yarn count 

Warp 18 yarns/cm 46/inch ± 0,5 % ISO 7211/2 

Weft 16 yarns/cm 41/inch ± 0,5 % 

Weight per m 2 560 g 16.5 oz/yd 2 ±5% ISO 2286 - 2 

Thickness 0,53 mm 21 mil ± 5 % ISO 2286 - 3 

Breaking strength 

Warp > 280 daN/5 cm > 371 lbs/in ISO 1421 

Weft > 200 daN/5 cm > 265 lbs/in 

Elongation to break point 

Warp and weft 

Thermal factors 

Thermal factors relating 

to the fabric alone 

Solar transmittance: 

Ts 

this factor gives 

the proportion of solar energy 

transmitted through the fabric. 

A low percentage means 

the fabric performs well 

at reducing solar energy. 

Solar reflectance: 

Rs 


the proportion of solar radiation 

reflected by the fabric. A high 

percentage means the fabric 

performs well at reflecting solar 

energy. 

Solar absorptance: 

As 


the proportion of solar radiation 

absorbed by the fabric. A low 

percentage means the fabric 

absorbs little solar energy. 

Solar radiation is always 

partially transmitted through, 

absorbed or reflected by the 

fabric. The sum of all 3 

equals 100. Ts + Rs + As = 

100 % of solar energy. 

Marking 

Making-up 

Standard packaging 

Digital printing / Screen printing 

Transfer / Paint / Adhesive 

Welding (thermal, high frequency, 

ultrasonic) or sewing 

Rolls of 50 lm 

The data in this document is for information only and may not be considered as binding 

5 -year 

warranty


® 

Thermal factors calculation 

using reference glazing and 

according to the position of 

the blind (indoor or outdoor) 

Shading coefficient 

Sc 

(or Fc shading factor 

or z*): this factor shows how 

effective the fabric is at filtering 

the heat from solar radiation. 

It is expressed as a factor 

between 0 and 1. A low figure 

means high protection 

from heat flow. 

Solar factor or gtot 

Fs 

factor*: the percentage 

of solar energy which actually 

penetrates into a room through 

the blind and glazing. 

Fs = Sc x Fs of glazing 

or in European terminology: 

gtot = Fc x g of glazing* 

The solar factor of the glazing 

(Fs of glazing or g of glazing) 

is an indication given by plain 

glass manufacturers. 

This is often given randomly 

as g of glazing = 0.75 

as reference for standard 

double glazing. 

> 

Optical factors 

Visible transmittance 

Tv 

(or TL Light transmission): 

this factor gives the total 

percentage of light radiated 

through the fabric over a wavelength 

of 380 to 780nm 

(nanometers), called the visible 

spectrum (total illumination). 

Openness factor 

Of 

(or Co Openness 

coefficient*): this factor gives, 

in brief, a percentage 

of holes in a fabric. 

In the European standard, it is 

considered as independent 

of the colour but, for fabrics 

with the same weave, it should 

be measured using the darkest 

colour in the range. 

Diffuse transmission 

Tdif 

factor*: correlation of 

the two factors above: 

Tdif = Tv – Co 

The diffuse part of total light 

transmission is indicated 

as Tvdif for the aspects of glare 

and shape recognition (visual 

contact to the outside/night 

privacy). However, for natural 

light control, it is indicated as 

Tvdifh. This is used to ascertain 

a fabric’s light diffusion capacity. 

Panel becomes a source of light 

if the sun shines directly on it. 

The light intensity, or "luminance", 

emitted by a fabric can also 

be measured in candelas/m 2 

(Cd/m 2 ). 

Ultraviolet 

Tuv 

transmittance factor: 

this factor gives the percentage 

of ultraviolet light radiated 

through the fabric over 

a wavelength of 280 to 380 nm 

(nanometers). UV radiation 

accelerates natural ageing. 

All means of solar protection 

ensure a certain amount 

of protection from UV rays. 

* European terminology 

> Exterior 

> Interior 

Dark colour 

Charcoal 

3030 

Light colour 

White 

0202 

Visual transmission 

(Tv or TL) 

Tv = 4 % Tv = 15 % 

Thermal transmission 

Total solar factor 

(gtot or fs) 

gtot = 9 % gtot = 13 % 

Dark colour 

Charcoal 

3030 

Light colour 

White 

0202 

Visual transmission 

(Tv or TL) 

Tv = 4 % Tv = 15 % 

Thermal transmission 

Total solar factor 

(gtot or fs) 

gtot = 37 % gtot = 25 % 


The technical data at a glance 

Thermal and optical factors in the European standard EN 14501 new! 

Openness factor (Co) 

OF 3% 

Colours 



Fabric 

Fabric + glazing 

Ts Rs As gv=0,59 gv=0,32 gv=0,59 gv=0,32 Tv Tvndif Tvdifh* 

gtot external blind gtot internal blind 

0202 White 18 69 13 0,12 0,08 0,34 0,25 17 13 

0205 White Canary 18 61 21 0,13 0,09 0,37 0,25 17 13 

0220 White Linen 16 62 22 0,12 0,08 0,37 0,25 14 11 

0207 White Pearl 13 53 34 0,10 0,07 0,39 0,26 11 8 

0720 Pearl Linen 13 44 43 0,11 0,08 0,42 0,27 10 8 

1002 Sable White 13 52 35 0,10 0,07 0,40 0,26 10 6 

1010 Sable 11 41 48 0,10 0,07 0,43 0,27 7 4 

0707 Pearl 11 38 51 0,10 0,07 0,44 0,27 9 7 

0201 White Grey 9 44 47 0,08 0,06 0,42 0,27 7 4 

0701 Pearl Grey 8 29 63 0,09 0,06 0,46 0,28 6 3 

0108 Grey Orange 7 31 62 0,08 0,06 0,46 0,28 4 1 

0109 Grey Mandarin 8 28 64 0,09 0,07 0,47 0,28 4 1 

0103 Grey Turquoise 7 29 64 0,08 0,06 0,47 0,28 4 1 

0150 Grey Green 8 26 66 0,09 0,07 0,48 0,28 4 1 

0110 Grey Sable 7 29 64 0,08 0,06 0,47 0,28 4 2 

0101 Grey 5 21 74 0,07 0,06 0,49 0,28 3 1 

3030 Charcoal 3 7 90 0,07 0,06 0,53 0,30 3 0 

gv = 0.59: solar factor of standard glazing, low-emission 4/16/4 double glazing filled with Argon. 

gv = 0.32: solar factor of standard glazing, reflecting low-emission 4/16/4 double glazing filled with Argon. 

Samples tested by the calculation methods laid down in standards EN 13363-1 "Solar protection devices combined with glazing – 

calculation of solar and light transmittance – Part 1: simplified method" and EN 410 "Glass in building – Determination of luminous and solar characteristics of glazing". 

Tvdifh* Data available on request.

Sunscreen 

® 


Thermal and optical factors in the American standard Ashrae 74-73 

Openness factor (Co) 

Colours 

OF 3% 



Fabric 

Fabric + glazing 

Ts Rs As 1/4” Cl. 1/4” H.A. 1/4” Cl. 1/4” H.A. Tv Tvndif Tvdifh 

Sc (Fc) external blind Sc (Fc) internal blind 

0202 White 17 64 19 0.20 0.18 0.35 0.33 15 

0205 White Canary 18 61 21 0.21 0.19 0.37 0.34 15 

Not applied 

in the American 

standard 

0220 White Linen 15 58 27 0.19 0.17 0.38 0.34 13 - 

0207 White Pearl 12 49 39 0.17 0.16 0.43 0.37 10 - 

0720 Pearl Linen 12 41 47 0.18 0.17 0.49 0.40 10 - 

1002 Sable White 12 49 39 0.17 0.16 0.43 0.37 9 - 

1010 Sable 9 40 51 0.15 0.14 0.49 0.40 7 - 

0707 Pearl 10 35 45 0.17 0.16 0.52 0.42 9 - 

0201 White Grey 8 40 52 0.14 0.14 0.48 0.40 7 - 

0701 Pearl Grey 7 26 67 0.15 0.14 0.57 0.44 6 - 

0108 Grey Orange 6 32 62 0.13 0.13 0.53 0.42 5 - 

0109 Grey Mandarin 7 28 65 0.15 0.14 0.56 0.43 5 - 

0103 Grey Turquoise 6 25 69 0.14 0.14 0.57 0.44 5 - 

0150 Grey Green 6 22 72 0.14 0.14 0.59 0.45 5 - 

1001 Sable Grey 6 30 64 0.14 0.13 0.54 0.43 6 - 

0110 Grey Sable 6 27 67 0.14 0.13 0.56 0.44 5 - 

0101 Grey 4 19 77 0.13 0.13 0.60 0.46 4 - 

1006 Sable Bronze 5 23 72 0.13 0.13 0.58 0.45 6 - 

3001 Charcoal Grey 3 11 86 0.13 0.13 0.65 0.48 4 - 

3006 Charcoal Bronze 3 7 90 0.13 0.13 0.67 0.50 4 - 

3030 Charcoal 2 6 92 0.13 0.12 0.68 0.50 4 

1/4" Cl: clear 1/4" (6mm) glazing. 

1/4" H.A.: heat absorbing 1/4" (6mm) glazing. 

Samples tested by the ASHRAE 74-73 standard "Method of measuring solar-optical properties of materials". 



® 

Advice 

Storage conditions 

The rolls of fabric should be stored horizontally, 

but not piled up, in a place where the temperature 

and level of humidity is as constant as possible 

The fabric should never be folded. 

For long-term storage, it is not advisable to leave 

rolled or folded panels on top of each other. 

Advice for blind making 

The panels of fabric are cut by blade or ultrasonically. 

They can be welded (thermal, high frequency or 

ultrasonic) or sewn together. 

The fabric must be properly squared before it is 

made up, especially for large blinds or structures. 

The blinds can be manufactured normally (vertical 

warp) or railroaded (vertical weft). 

Horizontal seams give the best result. 

For external blinds, Mermet recommends the sides 

to be reinforced with welding tapes, made of translucent 

coated yarns structure 

For tensile structures, it is better to make a pocket 

to fit all the way around the panel. 

Very long blinds may need the addition of stiffeners 

to ensure they will still hang properly after time. 

Care instructions 

Remove dust with vacuum cleaner or compressed 

air. 

Do not scrub. 

Do not use solvents or any abrasive substance that 

might damage the coating of fabric. 

Clean with a sponge or soft brush dipped in soapy 

water (a high pressure water spray can be used at a 

distance on external blinds). 

Rinse with clear water. 

Leave the blind down until completely dry. 

Photos: Shading Systems - DT Structures - Architen Landrell Ltd - Saudi Metal Ceilings / Starbucks Coffee - Liam Carson - B. Meudic / Meudic Studio / Cabinet Chaduc / 

Stores Ecochard - Michael Dowd © Dimensions Displays - Mermet S.A. - X... 

MERMET S.A. 

58, chemin du Mont Maurin 

F 38630 VEYRINS THUELLIN 

Tel: +33 (0) 474 336 615 

Fax: +33 (0) 474 339 729 

> 

www.sunscreen-mermet.com

Sunscreen® Natté 4503 - CMS

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