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Appearance quality of the toilet paper is the toilet paper is useless eye or organs directly tell, without measurement, impact use of instrument and equipment defects.
Paper surface is visible with the naked eye with paper color differs significantly from the black, yellow, deep yellow, yellow-brown or Brown and other impurities.
Paper color of visible light and reflective points of inconsistency. Consists of many kinds, such as wet spots, cylinder, steam spot spot, plasma spots, white patches, pieces of plaque and light and dark spots, etc.
3, bubble fish grouper and spots
Former is a thick fish, scaly spots on the side, which is slightly thick spots around.
4, light and curtains
Light and curtains are all examples of paper fibers on the thin but not fully penetrated, its light transmission than in other parts of the paper ideas, small called the transmission point, called the big curtain.