Colour fastness

A feature of polypropylene is the impossibility of colouring it in normal textile processes. Therefore it should be solution dyed that gives a high degree of fastness in extreme circumstances.

There is a special Nickel Complex additive that when added to the mass allows a printing additive dyeing with special coloring, although bright shades cannot be obtained.

TABLE OF FASTNESS

Fastness of colourings used in a 2,5% Concentration.

	YELLOW	ORANGE	REDDISH GREY	RED	BLUE	GREEN	BLACK
Fastness to light	6-7	6	8	6-7	8	8	8
Washing (ISO 3 TEST)	4-5	5	5	4-5	5	4-5	5
Bleeding on PP	5	5	5	5	5	5	5
Bleeding on viscose	5	5	5	5	5	5	5
Alkaline perspiration	5	5	5	5	5	5	5
Dry cleaning	5	5	5	5	5	5	5
Moisture treatement	5	5	5	5	5	5	5
Dry treatement	4-5	4-5	4-5	5	5	5	5
Sea water	5	5	5	5	5	5	5
Swimming pool water	5	5	5	4-5	5	5	5

REMARKS:

-For light fastness, index-numbers go from 1 to 8 in blue shades with Xenotest 1.200

-All other index numbers go from 1 to 5

-Dry cleaning must be understood with Perchlor-athylene.

-Swimming pool water includes 20 mg/l. of active chlorine.

-Test washing ISO-3 is equivalent to a washing at 60ºC. with 5 glb. of soap and 2 glb. of soda carbonate for 30 minuts.

The ISO 9000 rules require us to use a high technological standard.

espectro.gif (37003 bytes)
Colour measuring photospectrometer.

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