Test Background
Paraffin resistance refers to the ability of pigment ink to resist the dissolution of paraffin in molten paraffin, resulting in paraffin staining due to certain pigments being dissolved in paraffin. The pigment paraffin resistance test determines the paraffin resistance of pigments.
Zhongke Testing Reliability Experiment Center has the capability of reliability testing of various pigments and provides professional paraffin resistance testing services for pigments. /div>
Scope of tests
1. According to the chemical composition of pigments, they can be divided into two categories: inorganic pigments and organic pigments. According to their sources, they can be divided into natural pigments and synthetic pigments.
2. Pigments are classified according to their function, such as anti-rust pigments, magnetic pigments, luminescent pigments, pearlescent pigments, conductive pigments, etc.
3. From the perspective of production and manufacturing, it can be classified into titanium pigments, iron pigments, chromium pigments, lead pigments, zinc pigments, metallic pigments, and organic synthetic pigments.
4. From the perspective of application, it can be classified into paint pigments, ink pigments, plastic pigments, rubber pigments, ceramic and enamel pigments, pharmaceutical and cosmetic pigments, art pigments, etc.
Test method
Place the wax-impregnated strips and blank paper strips side by side on the pictorial printing paper. Under natural lighting facing north, the incident light is at an angle of 45° to the object being observed.
The observation direction is perpendicular to the surface of the object to be observed, and the staining level of the ink-free part is visually evaluated against the gray sample card for staining assessment.
Test standard:
GB/T 5211.5-2008 Pigment resistance determination method
GB 250 gray sample card for assessing discoloration
GB 251 Gray sample card for stain assessment
GB/T 254 semi-refined paraffin
GB/T1864-1989 Comparison of pigment colors
GB/T 1914 Chemical analysis filter paper
GB/T 6682 Specifications and test methods for water in analytical laboratories
GB/T 10335.1 Coated paper and cardboard Coated art printing paper (coated paper)
