Ethanol Proof Markers

Filolang MK-75 Ethanol Proof Markers Summary: The Filolang MK-75 Ethanol Proof Markers are specialized laboratory marking pens designed for demanding research environments where conventional markers fail. Key Features: These markers feature a unique oil-based formulation that bonds strongly to various surfaces, providing unmatched durability in lab environments and resisting smearing, fading, and dissolving in strong alcoholic solvents, unlike conventional alternatives. Performance: The oil-based formulation ensures clear visibility even after extensive exposure to ethanol washing, making them essential for accurate and persistent labeling in demanding biochemical processes. According to testing data, the Filolang MK-75 successfully survived 4-hour immersion in >99% ethanol with no detected fading, no bleeding through plastic, and zero instances of smearing when wiped with lint-free solvent-soaked wipes—outperforming alternative brands like Sharpie, Posca, Staedtler, and Uni-ball. Ideal Applications: Laboratory sample tracking Cold storage at -80°C Fume hoods with volatile organic compounds Areas near liquid nitrogen where condensation occurs Any environment requiring ethanol-resistant permanent labeling The 2.0mm tip specifically would be useful for marking larger containers or when broader, more visible markings are needed compared to fine-tip alternatives. Advantages Over Competitors: These markers significantly outperform standard permanent markers in chemistry and biology labs, particularly when samples require exposure to solvents, sterilization, or extreme temperatures.