Qingtong Brocade YQ-Z-48B Whiteness meter operating instructions

1. use

1.1 This instrument mainly measures the surface reflection whiteness of various objects such as paper, cardboard, pulp, chemical fiber, cotton, textiles, plastics, ceramics, enamel, starch, salt, white cement, porcelain clay, talcum powder, etc. It can also measure translucent materials Optical properties such as transparency and opacity;

1.2 Measure the blue light diffuse reflection factor (R457) of the sample, also known as "blue light whiteness" or "ISO brightness"; 1.3 Analyze whether the sample contains fluorescent whitening agent, and can measure the fluorescent whiteness produced by fluorescence emission (that is, increase BaiDu);

1.4 Measure the opacity, transparency, light scattering coefficient and light absorption coefficient of the sample.

2. Executive standard

This instrument implements the following standards:

GB/T3978-2008 standard illuminants and geometric conditions

JJG (light industry) 48-2000 reflection photometer

GB/T7973-2003 Determination of diffuse reflection factor of paper, cardboard and pulp (diffuse/perpendicular method) GB/T7974-2002 Determination of brightness (whiteness) of paper, cardboard and pulp (diffuse/perpendicular method) GB/T1543- 2005 Determination of paper and board opacity (paper backing) (diffuse reflectance method) GB/T2679.1-1993 Determination of paper transparency

GB/T10339-2007 Determination of light scattering and light absorption coefficient of paper, board and pulp

GB/T12911-1991 Determination of ink absorption of paper and board

GB/T22427.6-2008 Determination of Starch Whiteness

GB/T2913-1982 Test method for whiteness of plastics

GB/T13025.2-2008 General test method for salt industry

GB/T5950-2008 Measurement method for whiteness of building materials and non-metallic mineral products

ISO 2470:1977 Paper and board — Determination of diffuse reflectance factor for blue light (ISO brightness)

ISO 2471:1977 Paper and board -- Determination of opacity (paper backing) by diffuse reflectance method

ISO3688-1986 Pulp - Determination of blue light diffuse reflectance factor (ISO brightness)

Textile Industry Standard: Method for Determination of Whiteness of Chemical Fiber Pulp