At present, people's understanding of the environmental performance of home improvement gradually increases, and the paint selection is also very clear and green. Therefore, the green paint on the market is becoming more and more flooded. How can we identify serious green paint? The true green paint must bear the “Ten Ring†sign issued by China Environmental Labelling Product Certification Committee. Do not look at the “national standard†word on the general paint because it is only the “admission criteria†for interior wall paint to enter the market. Look at the surface of the paint. High-quality and colorful paints The protective rubber solution layer is colorless or yellowish and clear. Smell the paint for pungent odors. Toxic paints do not necessarily have odors, but paints with odors must be toxic. If the paint is heavily stratified, it means that the quality is poor. After gently stirring with a stick and lifting it, the paint stays on the stick for a long time and the coverage is even, which means that the quality is better. The lighter the hand, the finer the better. Carefully review the product quality inspection report, paying particular attention to the total organic volatile content (VOC) of the paint. At present, the national standard for coating VOC content should not exceed 200 milligrams per liter. Better coatings should be less than 100 milligrams per liter, while environmentally friendly coatings should be close to zero. Ask about the solvent situation, a good brand will limit the use of toxic solvents. Generally speaking, after the coating is dried, its solvent can be substantially volatilized, but this requires a process, in particular a room-temperature curing coating. Furniture brand water heater brand paint home improvement
When there is liquid in the Pipette tip, do not place the pipette horizontally or upside down, so as to prevent the liquid from flowing back and corroding the piston spring.In the process of biological experiments, especially in the field of Cell Culture, the pipette is an indispensable laboratory instrument, and the pipette holder is also used very frequently on the laboratory ultra-clean bench or in the biological safety cabinet. The ease of use of the pipette and the pipette holder also affects the ease of experimental operation.
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