1, natural color cotton has only deep, shallow different palm, green two kinds of color, other facial expression still does not have normal product at present.
2, natural color cotton color is not normally bright-coloured, the reason is fiber exterior a wax pledges with phellem character covering layer, the exterior is dim, consequently downy. But classics bath (especially hot water is added alkaline) hind decrease character because of phellem, spend colourfully can increase instead. If be exposed for a long time,fall in strong light, as a result of actinic reaction, the waxiness in fiber can become yellow.
3, if use microscope to observe its fiber section, same kind of color, natural color cotton should be inside deep outside shallow, and the fiber cross section that catchs with chemical dye, it is outside color deep, and the center is low.
4, the commodity of product of natural color cotton is due certificate, certificate number is: HIBZ-30-001. Prevailing prices of product of natural color cotton is higher, the Ying Shen when the choose and buy is heavy.
6) cotton and breed of chemical fiber blending identify
Feel of pure cotton goods is soft, fabric surface is not quite flowing, burnish of surface of fabric of cleanse cotton blending is bright, feel holds out bright bright and clean, level off, the hand is grasped close after loosening go out not easily lose grain; Rich fine cloth and colour and lustre of man-made cotton cloth are bright-coloured, feel is flowing and soft bright and clean: The organization of man-made cotton is more inattentive, protect model spend difference; Cloth of vinylon and cotton blend criterion colour and lustre is a bit dark, uneveness of gloss, feel is not downy, the surface is rough. It and rich fine cloth, man-made cotton is same, go out easily lose grain.
(3) how do we sum up use combustion law to differentiate fabrics finally?
Cotton: Combustible, catch fire rapid, account of fine and soft grey black garrulous is shown after paper lights flavour, combustion.
Hemp: Combustion characteristic and cotton are similar, have paper combustion taste, combustion hind shows fine and soft ashen garrulous account.
: After catching fire, burn slowly, hairiness sends combustion flavour, combustion hind is black anxious carbon shape, brittle.
Polyester fibber (dacron) : The Yi Rong when combustion, still continue to burn from igneous hind, have smother, dan Rong solves content to won't fall down, have balmy taste, combustion hind is hard, black, round bead shape.
Fine black silk ribbon (synthesize abb) : Melt burns, piquancy having laborious, combustion content shows small black hard ball.
Polyamide fibber (Ni Guan) : Blaze is close to melt, destroy oneself next, from celery flavour, dan Huanghe's lubricious nugget is shown after burning.
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