Quantitative determination of physical and chemical indexes of fluorescent red powder

The quantitative determination method of fluorescent red powder is not available at present, but can be carried out according to the actual situation in future communication.

Coloring power: Two test methods:
(1) Visual comparison method: GB/T5211.19-88
(2) Instrumental determination method: GB/T13451.2-92. In the corresponding fluorescence intensity test method of any of the above methods, the tinting force of fixed sample color code is 100%, and 100%+-2 is used to test the tinting force value of fluorescent powder.

Volatile components: ethanol water
Oil absorption :31~42%/110g: Determination of oil absorption of pigments GB 5211.15-88 The minimum mass of linseed oil required to make a certain amount of pigments form uniform groups under specified test conditions.

Relative fluorescence intensity :90~110% : Select markets because common fluorescence (generally for 365 nm inspiring because inorganic fluorescent), using fluorescence intensity of fluorescence spectrophotometer to measure the absolute, is commonly the fluorescence intensity values of the group of phosphors, selecting average is classified as one unit as the basic value (1) for the unit, and then measured by fluorescence spectrophotometer measured the brightness of the fluorescent powder compare to baseline values.

Water resistance: Determination of water resistance of grade 5 pigment GB/T5211.5-85 Grade 1~5, grade 5 is the best, stored under conventional humidity for more than 5 years without any change.
Acid resistance: Grade 5 pigment acid resistance determination GB/T5211.6-85 grade 1~5, grade 5 is the best, PH≥5 acidic conditions, stored for more than 5 years without any change.

Alkali resistance: Determination of grade 4 pigment alkali resistance GB/T5211.7-85 Grade 1~5, grade 4, PH≦9 Under alkaline conditions, no change for more than 5 years.

Light resistance: ≥1 grade (95 hours of sun exposure) Determination of light resistance of pigments GB 1710-79 Grade 1~8, grade 1 is the worst, natural light (no strong ultraviolet radiation) stored for more than 5 years without significant change.

Heat resistance: 150℃(bake for 30 minutes) determination of heat resistance of pigment GB 1716-79 Based on fluorescence relative strength determination method, the highest practical temperature ≦200℃ (theoretical value).

Conventional industrial applications applicable temperature <60℃, low temperature unlimited.

The product is sealed and stored in the range of 0~30℃ at normal temperature for more than 5 years, and the luminescence effect of the fluorescent powder will not have any attenuation.

For fluorescent pretty in structure of coordination bond under the environment of high temperature, hot flashes and other easy to decompose, and the solution because if entities Fe3 + also extremely easily with fluorescent structure composition of silks complex emetic reaction to form a shape of red blood, so the phosphor of the preservation and use at room temperature (25 degrees or so), a cool, dry and free of rust texture conditions for the best, Under these conditions, the properties of the fluorescent medium will not degrade significantly in 5 years.

According to the size of its saturation, ketone > benzene > fat > alcohol > water, especially butanone is the best. The fluorescence medium has excellent stability in the above solvents or conventional solvents.