Handle crayon test report.
Crayons are a widely used painting tool, and their quality has an important impact on the effectiveness and safety of the painting. In order to ensure the quality of crayons, a series of tests need to be carried out, including QB T 1336 body appearance, color, depiction performance, softening point, bending strength, lightfastness, solubility and other aspects of the test.
1. Appearance inspection.
The appearance of a crayon is the first impression to evaluate its quality, so visual inspection is very important. Visual inspection includes checking the shape, size, color, gloss, etc. of the crayon. Crayons are required to have no bubbles, cracks, deformation and other defects, and the surface is smooth and neat, without obvious scratches and damage.
2. Color detection.
Color is one of the important attributes of crayons, which directly affects the painting effect. Color detection requires the color of crayons to be pure and vivid, without color difference and variegation. For colored crayons, the color is required to be bright and full, with no obvious color spots and color differences.
3. Depict performance testing.
Depiction performance is one of the main functions of crayons, which require crayons to be able to draw lines smoothly on the paper without jamming or breaking. In order to test the depiction performance of crayons, you can perform a smear test, that is, apply a certain length of lines on paper to see if the lines are smooth and even.
Fourth, softening point detection.
The softening point is the point at which the crayon softens and begins to melt after heating. The softening point has an important impact on the longevity of the crayon and the painting result. The softening point test can be carried out by a heating test, that is, the crayon is placed in an incubator at a certain temperature to observe the softening of the crayon.
5. Bending resistance test.
Bending resistance refers to the ability of crayons to not break easily when subjected to external forces. The flexural resistance test can be carried out by flexure test, that is, the crayon is placed under a certain weight weight to observe the degree of bending of the crayon and whether it breaks.
6. Lightfastness test.
Lightfastness refers to the ability of crayons to fade less easily after being exposed to light. The lightfastness test can be done by irradiating the crayon under a certain intensity of ultraviolet light to observe the color change of the crayon.
7. Solubility test.
Solubility refers to how much and how quickly crayons dissolve in water. Solubility testing can be done by placing the crayon in water at a certain temperature to observe and record the time and extent of the crayon dissolving.
The above seven aspects of testing are important indicators to evaluate the quality of crayons, through which you can fully understand the performance and quality of crayons. At the same time, in order to ensure the quality and safety of crayons, it is also necessary to strictly control and supervise the raw materials and processes in the production process.